This massive complex is made up of hundreds of smaller temples that date back to the ninth century.

Hundreds of Buddhas in a re-discovered Indonesian temple.

This remote mountain shrine is one of the most sacred Zoroastrian temples remaining in the world.

Submerged trees jut ghost-like out of an idyllic turquoise mountain lake.

The bright red stripes streaking across the rocks are the star feature at this Icelandic waterfall.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the century.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

This massive library holds what was once the largest book collection in the world.

Berlin's oldest surviving academic architecture hosted decades of animal dissections.

Started as a kitchen garden, now the second largest botanical garden in the world.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

Gardens representing parts of Asia, Europe, and the Mid East are tucked away among the Soviet-style buildings in East Berlin.

A fascinating insight into daily life in the Eastern Bloc.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

France's third-largest necropolis offers a peaceful respite from a busy port city.

What if all public housing projects had been designed by "the Pygmalion of modern architecture," not only their prototype?

This modern museum of Mediterranean culture is surrounded by a surreal concrete honeycomb.

Light still pours into the ruins of this ancient Islamic observatory.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

Rebuilt several decades ago, its striking murals prevent it from being reconsecrated as a church.

A gorgeous gilded tower houses what may be the world's largest collection of gin.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

A set of seven houses, each built in a style that represents a European country.

A curious art park at the geographic center of Europe is home to 3,000 television sets and other wonders.