A railroad tunnel that, upon its completion, was considered one of the engineering marvels of the modern world.

This beloved marketplace mascot poops money and grants good luck.

Nassau Hall has served as army barracks, a museum, and played a key role in the American Revolution.

This giant disembodied horse head seems to balance impossibly on its nose.

A World War II battle site made famous by one man's heroic actions.

This little slice of old Jerusalem in Oklahoma is the evolution of a century-old passion play.

A peculiar forest that was handcrafted for government experiments.

American bison herd descending directly from a Bronx Zoo breeding program that saved the species from extinction.

Final resting place of Geronimo, Quanah Parker, and the first atomic gun ever fired.

Why have you never heard of the second most popular tourist site in New York?

A gigantic 10-foot tall stone man.

The real-life site of Ichabod Crane's infamous gourd attack.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

A spiritual vortex among the red rocks in Sedona.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

A sharp bend in a dramatic river canyon cut through red rocks.

This impressive working clock made of 16,000 plants changes its flowers twice a year.

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

In Egypt's expanding metro area, many of the neighbors are dead.

This ancient structure is widely thought to be the oldest intact pyramid in the world.

This ancient theater was once the home of fierce gladiatorial battles.

The world's most active stratovolcano is almost always erupting.

A monument to the two U.S. officers killed by North Korean troops while trying to trim a poplar tree.

The site of many tense prisoner exchanges across the Military Demarcation Line between North and South Korea.