Brain collection and database that narrows the gap between man and animal.

The Pentagon sits on a former island that was in Virginia at low tide and D.C. at high tide.

A remote hill on a stretch of country road where the laws of physics are defied... or so it seems.

One of the largest fleets of armored vehicles in the world, sitting out in the California desert.

This one-room cabin where the young colonel slept during the French and Indian War.

America's greatest forgotten garden and the former stomping grounds of Son of Sam.

The hidden offices underneath Memorial Bridge have been locked up since 1976.

The haunting complex honors the millions of Ukrainians who died in the forced famine under Soviet rule.

An enchanting landscape of ancient sandstone structures eroded into otherworldly shapes.

A way to take your secrets to someone else's grave.

This supermarket is suspended 25 feet above an interstate highway.

Could it have picked a better place to land?

A model of a galactic embassy is hidden in plain sight along the highway, proposed by a UFO religion to find the aliens that created life on Earth.

The London statue that imitates passersby.

A library of only unpublished manuscripts.

This downtown Dallas art installation is always on the lookout.

A speck of nature and art in one of San Francisco’s most notorious neighborhoods.

A statue of the original Pearly King is hidden in a church's crypt.

Scores of vintage street lamps shine along L.A.’s Miracle Mile.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

A public display of random paleontology.

A pair of large white marble lions guard this stretch of the Mojave Desert, and it is utterly mysterious how they got there.

A luxury hotel housed in a former 15th century Gothic church.

Bronze plates placed around this Scottish fishing village form a true-scale model of the solar system.