Archnet A World Wide Web virtual library for Archaeology. An invaluable resource for web designers. One of the oldest art museums in the world. The spot for Medieval and Renaissance paintings. If you are interested in the indigenous pagan or heathen religions of Europe, this is the best site I've found promoting the heathen religion of Asatru.
Most intentional communities fizzle out in a few years.
Findhorn has been going strong for more than 30. Findhorn is particularly involved in ecological activities. They also built one of the largest underground buildings on the planet without anyone knowing about it. Damanhur and Damanhurians are a strange and quixotic bunch, but cool. In between working for one of their several industries, they seem to preoccupy themselves with building magickal structures.