An enormous and lavish Gothic church in Czechia.

Well-preserved, still-functional sliding wood doors from Ancient Rome can be found in this Vesuvius-stricken house.

This medieval castle was reconstructed by Carlo Scarpa.

Once home to one of the oldest banks in the world, this building is also where Marco Polo's famous travelogue was written.

A visionary Italian architect created an impressive cluster of concrete structures for a family's private tomb.

Also known as the Temple of Poseidon, this is one of the best-preserved Greek temples in the world.

This cathedral hides a sculpted dog that determines your fate and an unexploded shell from World War II.

Also known as the Square Colosseum, this building is a prime example of fascist-era rationalist architecture.

Ancient snack bar of the Roman Empire re-opened.

Five candy-colored villages on the Italian Riviera.

An eccentric playboy's astounding natural history collection.

A millionaire's abandoned swimming pool from the gilded age of one of America's most distinguished families.

This hidden oasis features a stunning view of the Hudson River and the Palisades from a castle-like museum.

Elevated freight railway turned wildly successful urban park.

The uniquely-designed winter home and sculpture studio of Anna and Archer Huntington.

The oldest Methodist church in the United States has been spreading the good news for over two centuries.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

A gothic church spire sits atop this skyscraper, the tallest church in the world.

Once at the center of U.S. finance, the historic Trading Room was meticulously recreated piece by piece and rebuilt in the Art Institute.

Mysterious 500-year-old tapestries depict a unicorn hunt.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.