This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

Puzzles within puzzles hide a golden treasure in this hedge maze.

The world's largest maze is a nature park with nearly 200 decision points.

A glacier pocked with ice caves and surrounded by rainforests.

An unusual manor of stunning beauty, born out of a crippling disease.

Museum celebrating the ocean, with the largest wunderkammer dedicated to sea exploration.

The tallest outdoor elevator in Europe rockets passengers on a dizzyingly precarious ride to the top of a mountain.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

Take a stroll through the hellish grotesques of Hieronymus Bosch in this elaborate Netherlands church.

The moving metal works of one troubled artist can still be viewed on his front lawn... for now.

This stream-carved gorge has inspired poets, hidden smugglers, and trained soldiers, all without losing its beauty.

"All Mountains - All The Time."

The stately remains of Llywelyn the Great's mighty fortress.

Increasingly decayed figures stand as a powerful reminder of the human costs of Czech Communism.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

Amidst the bustling streets of Dublin, there is a hushed garden that is dedicated to "All those who gave their lives in the cause of Irish Freedom."

Twice a day one of these tragic bronze mariners drowns with the tide to remember all those the sea has taken.

A four story, football field-sized, nine-grotto creation made of shells, minerals, and rare stones.

The world's oldest rose is so tough it survived being bombed in World War II.

Science fiction's grandfather has a fittingly marvelous tomb.

This monument remembers one of the manliest men of the frontier who fought a grizzly before dragging himself 200 miles to safety.

A psychological self-portrait in the form of a giant, segmented head.