The East is a district of Berlin. It consists of the boroughs Lichtenberg, Hohenschönhausen, Marzahn and Hellersdorf.
Lichtenberg is a district in the east of Berlin. It was merged together with Hohenschönhausen in 2001. Lichtenberg is mostly a residential district, but because of its heterogeneity there are all classes of people living there. The center of Lichtenberg (where are some buildings left from the 19th century) is home to the working class, as is the centre of Hohenschönhausen (built mainly in the 70s in rather ugly GDR socialist building block architecture). The middle class resides in the greener areas like Friedrichsfelde, whereas in Karlshorst you can watch some smaller mansions of the upper class.
Most interesting for tourists are the Stasi (secret service of the GDR) relics/museums, the Tierpark (zoo) and some remarkable architecture such as the Mies van der Rohe house.
Marzahn-Hellersdorf is a district in the northeast of Berlin. It is largely a residential district for the underclass and the middle class. It is famous for it's GDR socialist building block architecture, but often ignored are some old, village-like parts. In general it is a very green district. There are only a few interesting sites for visitors. Most interesting are maybe the "Gärten der Welt", the Gründerzeitmuseum and the Schlosspark Biesdorf with its small castle in late classical style. A more thorough description of the district can be found on the official website .
Use S-Bahn (lines 5, 7 and 75) or U-Bahn (U5) to get into Lichtenberg. You can also use the regional train, but it's not as regular as the S-Bahn. The stations of biggest interests are S-Bahn station Lichtenberg (where also a few long distance trains run from) and Tierpark (U5). S-Bahn Line 75, which goes also to Hohenschönhausen.
The S-Bahn lines 75 or 5 and the U-Bahn line 5 will get you to most parts, otherwise take the tram: the M6, for example, starts in the city center (e.g. Alexanderplatz) and runs through almost the entire district.
The Tierpark (former East-Berlin-Zoo) is spacier (rather like a park with animals than a classical zoo, in fact it's one of the biggest zoos in Europe) than the Zoo in the center of West-Berlin. This Tierpark has nearly as many animals, but fewer reptiles and aquatic animals. There is an old castle from the late 17th century in the northeast of the Tierpark (Schloss Friedrichsfelde). Get out at U-Bahn station Tierpark (U5).
Stasi (Secret Police) Museum This museum describes the procedures applied by the DDR secret police. Get out at Magdalenenstrasse (U5) and head to Ruschestrasse (no. 103).
Stasi (Secret Police) Prison (Gedenkstätte Hohenschönhausen), Genslerstraße 66 (S-bahn to Landsberger Alee, then tram 6 to Genslerstrasse, then walk 1km along Genslerstrasse, the prison is on the right), ☎ +49 - (0)30 - 98 60 82 - 30, . Experience the Stasi Secret Police Prison first-hand. Daily English-speaking tour between July, 1st and November 14th, 2.30 p.m. €5.
German-Russian Museum This museum describes the history of the GDR-Russian relationship during the Cold War. Get out at S-Bahn station Karlshorst and go by bus 396 direction Tierpark (2 or 3 stations).
Mies van der Rohe Haus, Oberseestrasse 60, . Tu-Su 11am-5pm. The last Mies van der Rohe building (a dwelling house) in Germany before his emigration to the U.S. (1938). Now there are small contemporary/modern art exhibitionsexhibitions are free, guided tours ca Euro 5.
Victoriastadt (West of S-Bahnhof Nöldnerplatz, Kaskelstrasse) A relatively good and complete obtained (at least regarding Berlin) residential quarter which was built in 19th century. Partly under renovation. Remarkable: There are six of the first ever made buildings built of concrete left (1875) - but you can't make out a difference from the outside.
Marzahn and Hellersdorf
World's Garden (Gärten der Welt) in Marzahn . Inside you can find a large and well established Chinese garden, a Korean garden, a small Bali's Garden/Glasshouse, an Oriental Garden with nice fountains and a cloister and a Japanese garden which is a project by the city partnership of Berlin and Tokyo. The latter has been built by Zen priests. Guided tours take place on Wednesdays, Thursdays and Fridays every 30 min from 10:30 until 12:30. The park is open daily from 9:00-16:00 (in March and October until 18:00, from April to September until 20:00). Although quite crowded at times, there are not that many tourists so here's a chance to brush up on your German skills. Entrance is 2 € in winter and 3 € in summer. As the journey to this park will be around an hour from the city center, don't miss this opportunity to complete your picture of Berlin by seeing some of Berlin's clean and quiet suburbs. Eisenacher Strasse, 99 - Berlin-Marzahn - S7 Marzahn (Zone B) + Bus 195 (before the departure ask to the driver for the right stop). Notice that another Eisenacher Strasse exists in Schöneberg, so don't be mislead by the U7 Station Eisenacher Strasse.
Gründerzeitmuseum (Museum of Wilhelminial style)  features many objects and even whole rooms in wilhelminian style. To get there from the city center: U5 until "Elsterwerdaer Platz", then bus 398 direction S Mahlsdorf until "Hultschiner Damm", then walk 300 m.
Schloss and Schlosspark Biesdorf is a small castle in late classical style. It was built 1868 by Gropius and other architects, the von Siemens family changed the castle a bit around 1900 and they enlarged the dimensions of the park, which is today renovated and nice to wander around when the sun is shining. Located within a few minutes' walking distance from Biesdorf station (take the S5 from the city centre) or Elsterwerdaer Platz station (U5).
Windmill One of the few windmills in Berlin is located in Marzahn. After registration one can visit it and have a look at the functions of the windmill. To get there, take the S7 or S75 until "Springpfuhl" station, then the tram 8 or M18 until "Alt-Marzahn".
Friedrichsfelde Central Cemetery (Zentralfriedhof Friedrichsfelde), (North-East of Lictenberg station). The cemetary is also know as also known as the Memorial to the Socialists. It has many interesting monuments and graves of know people.
As Berlin is a city of art, it is quite easy to find an art gallery on your way. They provide a nice opportunity to have a look at modern artists' work in a not so crowded environment for free. Here are some of the galleries in Marzahn-Hellersdorf:
Galerie M: open Sunday - Thursday 1 p.m. till 6 p.m. Varying exhibitions, for details see  (in German). Marzahner Promenade 13, 12679 Berlin. Next S-Bahn station is "Marzahn" (S 7).
Galerie KLIN: open Monday to Friday 10 a.m. to 6 p.m., Ahrensfelder Chaussee 150 a, 12689 Berlin.
There is a harness racing track in Karlshorst (Treskowallee 129, S-Bahnhof Karlshorst ). Usually the races take place on Sundays.
Before or after visiting the "Gardens of the World", tourists might be interested in climbing on top of the Kienberg (a small hill nearby with a view on the surrounding suburbs) or to go for a walk in the valley of the Wuhle (a small river). More information on the area can be found on the district's official website (in German): 
Shopping centers are mainly providing goods for the local population, but there are several shopping centers in the district such as the following:
Eastgate Berlin which is located next to the S Bahn Station Marzahn and comprises about 150 shops, restaurants etc. For the center's website, see the following link . Close by is an enterntainment center with cinemas etc.
Helle Mitte a smaller shopping center next to U 5 Station "Hellersdorf", in the area around Alice Salomon Platz.
Spree Center another small shopping center at Hellersdofer Straße opposite to the U 5 station "Kaulsdorf Nord".
Tierpark Bistro at the U5 station at Tierpark has some of the best Doener in the Berlin area. They have a great neighborhood feel, and delicious Middle Eastern food in the German style.
Most restaurants in Marzahn-Hellersdorf belong to the lower price segment, some to the medium range, and exclusive restaurants are virtually non-existent. Here two tips:
La Paz - Mexican restaurant / bar, in summer you can sit outside in the adjacent pedestrian area. Good food and friendly service. Kurt-Weill-Gasse 7, 12627 Berlin, about 5 minute's walk from U 5 Station "Hellersdorf".
Ristorante Pizzeria Sicilia - as the name suggests, a good Italian restaurant, at the left side of the "Cecilienplatz" (if you exit the U Bahn (metro)-Station Kaulsdorf Nord). Good food and friendly people, native Italians will likely have a chat in Italian with the "patrone". Do not be shocked by the area around which is somewhat grey with a lot of concrete, but the restaurant is really nice. In summer, you can sit in a tent outside which is surrounded by flowers. Somewhat more expensive than the La Paz, for a good dinner with three courses and drinks, you'll need about 40-50 € per person. Pasta and pizza are cheaper, of course. According to latest reports, the restaurant was recently renamed and has a new owner.
Nil Sudanesiche Spezialitate - unique place at with ethnic cuisine from Sudan. Prices begin at 2 €. Wonderful place for anybody who would like to taste something from Africa, like Qaurd cheese with fenugreek and black cumin or peanut soup - different and original. Friedrichshain Grünberger str. 52
Biergarten, (at Biesdorf S-station). It is simple, but friendly and a convenient place to have a beer and a currywurst after visiting the castle.
Electro Kohle, Weitlingstrasse 68-70. Open Friday and Saturday, Techno and Trance.
Hotel Helle Mitte, modern but affordable middle-class hotel (3 stars), Kurt-Weill-Gasse 7, 12627 Berlin. Telephone ++49 (0) 30930290
Etap Berlin Ost, typical low budget hotel (1 star) managed by the Accor group. Allee der Kosmonauten 33c, 12681 Berlin. Telephone ++49 (0) 3054003220.
Park Hotel Schloss Kaulsdorf, probably the only luxurious hotel in the area (4 stars), in a small castle. Brodauer Str. 33, 12621 Berlin. Telephone ++ 49 (0) 30565950
Youth hostel Pro-social, Blumberger Damm 12, 12683 Berlin, ☎ +49 (0) 30 56 29 260, . Youth hostel "Pro-social", The Youth Hostel of ’Pro-Social’ House on Blumberger Damm have become a highlight for young tourists in the Marzahn-Hellersdorf region of Berlin. the Youth Hostel we have 153 beds in apartments with modern, well-furnished rooms of 1 to 4 beds all have sofa/living area, as well as separate shower and WC, a small entrance hall). These are available for young tourists, youth groups, school classes, language course groups, cultural ensembles, sportsteams,in fact anyone who wants to explore Berlin. Youth Hostel puts on satisfying and healthy meals for guests. One night in a four person apartment 12,00 Euro. Up to three nigth stay 14.00 Euro. Breakfast = 3,50 Euro. Alongside our value-for-money breakfast, lunch and dinner menus B&B, Half Board and Full Board12,50 Euro.