Ano Koufonisi (Greek: Άνω Κουφονήσι), usually referred just as Koufonisi (Greek: Κουφονήσι), is the main attraction in the Little Cyclades. There is also another Koufonisi, Kato Koufonisi nearby. The whole Small Cyclades are often referred as Koufonisia.
Just one Village. It's a small island.
Sea caves: on Pano Koufonissi’s North Cape.
Saint Goerge’s church: the protector of the island. On Saint George’s day (normally celebrated on 23rd April, but if it coincides with Lent then it is celebrated on Easter Monday), there is a litany/procession of his icon on the seaside street, while the streets are covered with rose petals. They put on fireworks and all the small boats of the island are sailing alongside. Tripe soup with vinegar and a stew or pasta is offered to everyone and then the feast starts.
Saint Nicholas’ small church: over Karnagio with a view to nine islands!
Mylos (Mill): A traditional windmill that has been renovated into a beautiful bar.
Panagia’s (Virgin Mary’s) church on Kato Koufonissi: situated on Deti’s pier and built on ancient ruins. On August 15th a big festival takes place there. At the end of the Mass, food is offered to everyone and then people are transferred by boats which are competing in the race to get to Pano Koufonissi first, where the feast is held.
Fishermen feast: the last saturday of June the captains of the caiques cook for everybody on the pier the traditional cacavia (boulliabaisse-a soup made with different types of fish). A feast follows with traditional music and dance.
Road service: A wide road takes you from the port to Finikas’ beach and the camping site. From the village there is an asphalt road that takes you to Pori, and another one that takes you to the petrol station and the helicopter airport.
Sea service: Kostas Prasinos’ small boat runs a regular daily service from the port to the beaches of: Finikas, Italida and Pori. Other small boats connect Pano (Upper) and Kato (Lower) Koufonissi.
Greek is the native language of the people of Koufonisi. However, most people also speak passable English and many speak German or other European languages.
All ferry and high speed ferry companies : schedules, connections, availability and prices, between Koufonisia, other Greek islands & Piraeus port (Athens) is here 
Cruise ships dock at the Port.
There is no airport in Koufonisi.
Everything is in walking distance. On foot is the main way to get around.
In the summer there is a regular bus service between the village and Charakopou/Fanos, back to village and then to Porí.
No taxi service is available on the island.
It is not worth the hassle to bring your own car to the island, although it is in theory possible. Roads turn out to be little more than dirt paths. There is one in the interior, and one along the south. A Gas station has opened in 2005 so you can refill your car now. Whether this is a good thing is questionable.
Motorbikes and mopeds are popular alternatives to cars. Especially mopeds are frequently used by local youths and can go to many places that cars cannot go - for example the twisted narrow streets of Koufonisi city.
If you start a day-trip with a moped, make you sure you do so on a full tank, as gas stations are sometimes hard to find. An extra stop at a gas station can save a lot of nerves. When renting a moped,which you can't do on the island, check if the profile of the tyres is ok and if the brakes work properly. If it is the last vehicle in store, be suspicious - it could be the one that needs a repair badly. Though helmets are not required on the streets, it might be a good idea to ask your rent-a-bike for one.
There are a couple of places to rent bicycles. Be careful if you're biking offroad as the cliffs and vegetation are fragile!
There is a couple of beaches on Koufonisi. The best is in the south-east. The wind mostly comes in from the north and also the sea tends to be somewhat rougher to the north. In the peak season the beaches can be very crowded, and some guests take the local ferry to neighbor islands to find less crowded beaches.
There aren't many shops open off season. During he summer months you have a variety of "tourist" shops, minimarkets, a bakery etc to choose from.
Once in Koufonisi food is not going to be a problem. Here you can find anything you wish... Seafood is the obvious choice.
The tap water could be avoided. Local drinks include Mythos (beer) and Ouzo.
Koufonisi is a generally very safe destination.