Legends say that this Art Deco apartment building almost became Hitler's British headquarters.

These ancient sunken lanes were naturally tunneled into the soft ground by countless footsteps.

Cliffs full of fossils at the portal to England's Jurassic Coast.

A circle stone within a stone circle.

A neolithic dolmen that was rebuilt after collapsing during the 19th century.

Perhaps the only prehistoric monument with its very own public bus stop.

A open air theatre built on a cliff by an eccentric British woman.

This former quarry is now a vibrant labyrinth of magical in situ sculptures.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

An underground city of salt.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

Baroque celebration of the end of the Great Plague of Vienna.

A spherical "micro-nation" in the heart of Vienna.

The topiary maze at the Habsburg hunting lodge.

A small but hugely whimsical theater where marionettes play out the "The Battle of Stalingrad."

A cluster of historic bathhouses built on the famed hot springs that gave the Georgian capital its name.

The charmingly disheveled clock tower of Tbilisi's puppet theater.

A crumbling cathedral condemned by an earthquake.

In a busy Oaxaca market, a nearly century-old drinks stand still serves family recipes from giant clay pots.