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

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Commemorating the spot where the famous scientist fed his pigeons.

The longest continuous underwater road in North America was built at the insistence of Franklin Roosevelt.

A decommissioned military complex that's now a modern industrial park.

A dilapidated dock tells the story of Titanic’s missed arrival.

An small and easily overlooked archaeology museum chock full of Egyptian artifacts.

Scattered throughout London are ancient remnants of the city's former bounding wall.

An enormous pink granite batholith, long attributed with spiritual powers by the Tonkawa Indians.

Official museum, hall of fame, and repository of the Texas Rangers.

Housed in a century-old building, this museum's dedicated not just to soft drinks, but to the free enterprise system.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

When ecosystems collide in the arid Southwest.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

This massive redwood tree has a hole in the base big enough to drive through.

A naturally mummified 2,000-year-old man.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.