This study room in the New York Public Library saw the creation of one of contemporary America's greatest traitors.

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

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

Northern Ireland's Brobdingnagian stepping stones.

These murals stand as reminders to the troubled history of this Northern Ireland city.

This opulent 16th-century Maharaja’s palace is a unique mix of Hindu and Muslim designs.

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

Also known as the "Red Taj Mahal."

This ancient Hindu temple is covered in thousands of colorful statues and has a long mythological history.

A tribute to Ponce de Leon's supposed quest for eternal youth.

St. Augustine's record-setting narrow street was designed to protect against pirates.

The capital of the Cayman Islands is a center of offshore banking, but gets battered by blistering hurricanes.

Send a postcard while vacationing with Satan.

This sea-based blowhole releases seawater when waves hit the coastal caves.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

High on a hill overlooking Los Angeles lives a world famous, high-power conical Tesla Coil.

The legendary building that needed ghostly approval before being built.

Historic funicular railway, believed to be the shortest railroad in the world.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

The Spanish king's private bathroom embraced the idea of a porcelain throne.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

One Portuguese poet described this cape, the westernmost point in mainland Europe, as "where the land ends and the sea begins."