The home of one of America's most wealthy industrialists is now a historic site that remembers a more decadent time in the country's history.

Stunning examples of Russia's 18th-century wooden architecture.

This cubist Vienna church building looks like some sort of alien stonehenge.

This building holds the embalmed remains of the leader of the Bolshevik Revolution.

A trio of colossal statues spread across a Dallas neighborhood chart the emergence of a giant robot born of a locomotive and spilled gin.

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

The rusting remains of the largest assembled WWII fleet on the West Coast.

An eerie, existential museum dedicated to the author of "The Metamorphosis."

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

The topiary maze at the Habsburg hunting lodge.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

Walk through Czech history in Prague's largest graveyard.

London's smallest police station is barely the size of a phone booth.

The second oldest continuously operating bar in Louisiana.

A beautiful 62-acre Catholic shrine and botanical garden.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

Two stunning 17th-century libraries and a cabinet of curiosities.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

The fairy tale castle of the "fairy-tale king."

A 140-year-old castle with underground caves hidden in San Francisco.

One of Canada's oldest museums, the beautiful Redpath has been serving up Natural History and Ethnography since 1882.