Hiding the longest subterranean river known in the world.

This historical Netherlands fortress still bears the marks of its single siege.

Incredible labyrinth of man made caves.

An underground city of ancient quarry tunnels hid thousands of Allied soldiers in WWI.

Dedicated to the American general whose reply to a German demand for surrender was simply "Nuts!"

A monument to the thousands of Canadian soldiers who died capturing the French ridge during World War I.

Fantastic views and thousands of love locks.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Over 60 chemical plants and oil refineries sit in a 15-mile-wide section outside town.

The statue of the famous elephant who was the original source of the word "jumbo".

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

Little island known for its massive beachfront "flowerpot" pillars.