This famous city eluded concrete detection until the early 2000's.

This enormous "cloth of the conquest" depicts the Norman invasion of England in mind-blowing detail.

This hunter-gatherer architecture is believed to be the oldest religious complex known.

Mausoleum and Holy Seat of Antiochus I of Commagene.

Ancient rock-hewn town that witnessed key events of Georgian history.

Highly unusual subterranean stupa and adjacent cave monastery.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

Hidden inside a hotel is a museum of miniature models depicting the traditions and history of Mexico.

A former factory hosts an amazing collection of Mexican marionettes.

The "world's smallest volcano" has been used to store meals and dispose of dead bodies.

An indigenous take on European design creates a stunning visual overload.

This rare volcano spews the strangest and (literally) coolest lava in the world.

An Aztec temple, the largest man-made pyramid in the world, sits buried in earth with a Spanish church set on top.

This Brazilian town built by Freemasons is full of colonial Masonic architecture and symbolic imagery.

This sweet Southern elixir comes from what may be the oldest grape vine in North America.

This fairytale house on the shore of a Chilean Lake oozes an eclectic mix of Chilote and German Cultural heritage.

Spanish religion mixed with local architecture has yielded a network of churches unlike any other.

A wooden dock art installation on Chiloé Island taps into the island's indigenous mythology.

A sliver of 19th-century Germany sits on the shore of a Chilean lake.

With the Wild Bunch hunted almost to extinction and the law closing in on him, Butch Cassidy fled to this remote cabin in Argentina.

Six rock shelters covered in abstract art created by ancient Ugandan tribes.

Five ancient libraries, little changed for centuries, preserve a medieval archive of Quranic lore and civic documents

The remains of an ancient Roman city are hidden underneath Bologna's beautiful public library.

This ancient hydrological marvel is now the base of a modern outdoor cinema.