Administratively, Yunnan is divided into 16 prefectures. Some of those are autonomous prefectures for various ethnic groups. For the traveller, Yunnan can be divided into seven regions:
Regions of Yunnan
Kunming Prefecture Without a doubt the heart of Yunnan Province. You will likely pass through here whether or not you want to in Yunnan (not that it is a bad thing!)
Central Yunnan West of Kunming and where the hills start becoming more rugged. This is a very popular region for backpackers. It includes Dali Prefecture and Chuxiong Prefecture
Eastern Yunnan Filled with the gorgeous scenery of the rolling hills of neighboring Guizhou and Guangxi transforming into the high, hilly plateau of Yunnan. This area includes many tourist sites not regularly visited by backpackers. It includes Zhaotong Prefecture, Qujing Prefecture and Wenshan Prefecture
Southeastern Yunnan Amazingly diverse, in one day you could pass through arid badlands, lush pine forests, barren hills and tropical rainforests. The urban centres in this area of Yunnan are very compact and it is quite easy to get around from city to city to see the sights. It includes Yuxi Prefecture and Honghe Hani and Yi Autonomous Prefecture
Southern Yunnan Geographically and ethnically part of Southeast Asia, but politically part of China. Jungle covers most of the terrain and this is probably the best region of China to escape the winter. It includes Simao Prefecture and Xishuangbanna, a major tourist area
Western Yunnan Home to some very rugged, off-the-beaten-path terrain. Once the location of the famed Burma Road, it is now one of China's most alluring destinations. It includes Lincang Prefecture, Baoshan Prefecture, Dehong Prefecture and Nujiang Prefecture
Northwestern Yunnan A chunk of ancient and historic Tibet within Yunnan's provincial boundaries. Many travelers come here to experience Tibet without having to enter the actual province and follow the road to West Sichuan. You will find towering mountain ranges and fascinating local culture here. It includes Lijiang Prefecture and Diqing Prefecture
Its name literally means south of the clouds. The province is one of the most diverse in China. The Northwest of the province is heavily influenced by Tibet, with whom it shares a border. The South is influenced by its proximity to Laos and Myanmar. The province is famed for its multitude of ethnic groups, whose diverse customs can still be seen today. Of China's fifty-five officially recognized ethnic minorities, twenty-five can be found in Yunnan: about one-third of the population is not ethnic Han-Chinese.
The official language of Yunnan is Mandarin Chinese (or Putonghua as it is known). The region is home to a plethora of dialects from Chinese, Tibetan and Thai language families. Yunnan is home to many minority groups who each have their own different language.
Local towns will often have their own version of Mandarin which are sub-dialects of the South-Western dialect of Mandarin common to Yunnan, Guizhou and Sichuan. Despite a heavy accent, the local dialect of Chinese is very similar to Northern Mandarin with only minor regional differences in grammar and pronunciation.
Until 2005, Kunming was accessible by rail from Hanoi, Vietnam via a narrow-gauge railroad built by the French. The Chinese section of this rail route is now closed, though, so the best way to get down to the border is by bus to Hekou (from where you can cross the border to Lao Cai and take the train to Hanoi), or by air from Kunming directly to Hanoi.
There is a railway from Hanoi to Nanning, Guangxi, and one with some sensational scenery from Nanning to Kunming. Another rail route reaches Kunming from central China via Guiyang, Guizhou, and a third one comes South to Kunming from Chengdu, Sichuan. All of these train routes offer spectacular scenery, with long stretches of bridges and tunnels.
Wujiaba Airport in Kunming is the biggest airport in Yunnan which is very near the urban, the taxi fare is about 10-15 Rmb if you want to go to any place of Kunming from the airport.
Kunming has non-stop service from Beijing, Xiamen and other Chinese cities. There are also flights to Southeast Asia. Laotian airlines and the consulate are both in the Camellia hotel, Kunming.
Bus, by thumb
There are multiple roads from Laos into Yunnan. It's not too hard to hitchhike, but it will take some time because of the often abyssmal road conditions and inept drivers. If coming from Luang Namtha, Laos, bus services are available to JingHong in Xishuangbanna, Yunnan. From Luang Prabang, Laos, a daily bus leaves at 7:00am for around 400,000 Lao kip. It arrives at the long distance bus station in Kunming very early in the morning the next day (around 5 or 6am depending on the driver). The road conditions on the Laos side both from Luang Namtha and Luang Prabang are at times sketchy and definitely mountainous to cause some people discomfort but get smoother on the China side and are much improved from awhile ago.
From Vietnam, the border crossing is from LaoCai, Vietnam, to HeKou, China. The rail route from HeKou to Kunming remains closed, so the only public transport option is by bus. The ride lasts roughly 10 hours, tickets cost around 135rmb and departure times are as following: 8:45am, 1050am, 1230pm, 100pm, 550pm, 555pm, 600pm, 605pm.
Golden Peacock Shipping company runs a speedboat three times a week on the Mekong river between Jinghong in southern Yunnan and Chiang Saen (Thailand). Passengers are not required to have visas for Laos or Myanmar, although the greater part of the trip is on the river bordering these countries.
Everything and everywhere is accessible by bus from Kunming. Dali takes about four hours, Lijiang seven, Zhongdian twelve. Generally, the transport network is built as hub and spoke, so the easiest way of getting to a smaller place is to travel to next biggest town near it, change and maybe change again. You can now reach most larger towns in Yunnan by day bus. There is a large collection of bus schedules, taken at bus stations all around the province, at .
Kunming is also the hub of train transport in Yunnan. Day and night trains now go both to Dali and Lijiang. Otherwise trains are of little importance to tourists inside the province.
Bicycle touring in Yunnan is a very good way to explore the local landscape and many cyclists from world have done this.The Dian-Zang highway(Yunnan Tibet highway) is one of the best cycling routes in China, and many cyclists gather together to explore the landscape and ethnic minority culture. You can hire bicycles in some cities, like Lijiang and Dali. It is possible to delivery your bike by train or bus. Yunnan Cycling  a local cycling website.
The Caves of the Liujng (Wenshan region)
The Stone Forest (Kunming region)
Hike the Mekong (Lancang) River
Soak in the hot spring waters at Anning - 34 km from Kunming
For the game of Go (Chinese: weiqi 围棋), the best Chinese stones are Yúnzǐ (云子), Yunnan stones. They are quite different from Japanese stones, and much cheaper. The flower and bird market in Kunming is a good place to pick up a set, and it is possible to visit the factory near Kunming. See the Yunzi article  on the go players' wiki, Sensei's Library.
Puer tea. Puer tea (普洱茶) is a local favorite of Yunnan.
Guo Qiao Mi Xian, meaning "Crossing the Bridge" Noodles, is a local style of steamy noodles with a variety of vegetables, meats, and usually a raw quail egg. The price of Guo Qiao Mi Xian is from Rmb 3 to 15 or higher, which determines what types of dishes you are given to add to the mix.
Yunnan people eat lots of spicy food, nearly each dish you order in a restaurant is very spicy, so if you don't like spicy food, you should tell the waiter or waitress first, in Mandarin: wo bu chi la, which means I don't eat spicy food or wo bu xi huan la cai, which means I don't like spicy food.
The tofu in Shi Ping county /石屏/ is very famous. The sauerkraut in Xinping county is famous. Xinping is a Yi Nationality Autonomous County in Yuxi city.
RuBing, Yunnan goat cheese, is one of the two cheeses (the other being Yak cheese) traditionally produced in China. Its quite soft and doesn't taste as strong as Western ones. It is usually served fried with vegetables, musrooms, or meat.
LaoNaiYangYu (Grandmother's Potatoes) are another Yunnan favorite. While potatoes are usually called Tudou in the rest of China, Yunnan calls them Yangyu (Yang 洋 is a term often designating imported or foreign things, so supposedly potatoes were called 'yangyu' because they were not originally part of chinese agriculture and diets but were a food choice adopted from foreigners). Laonaiyangyu are like a spicier version of mashed potatoes with green onions mixed in.
SuHongDou is a kidney bean dish. The beans are deep fried to the point of being crispy and are a great vegetarian option for any travelers in Yunnan.
Yak butter tea
Yunnan red wines. Some, such as Shangrila brand, are quite good.
Beer Lao, imported from Laos. Local brands, the usual Chinese brands, and other imports are also available, but Beer Lao is very popular with travellers.