Ruins of a Carnegie family mansion on Cumberland Island.

A monument celebrating the idea of reaching inaccessible places.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

Public works and national defense project meant to carve a canal all the way across the state of Florida.

Town of spiritualists and mediums in Florida.

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

Former utopian colony based on the belief that the universe exists in a hollow sphere.

Electrical pylon in the shape of Disney's beloved mouse.

A lonely house representing railroad history tells the stories of those who rode the rails.

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

An experimental, automotive replica of Stonehenge.

Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

An enormous, inside-out glass globe built in 1935.

America's oldest archaeological site or a muddled case of wishful thinking.

This large cemetery is known as the museum of granite sculptures.

Despite its lavish ornamentation, and wholesome lifestyle of its devotees, this mountain commune has faced its share of issues.

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

Cryptic messages embedded in the New York City sidewalk.

Try not to get slimed in Tribeca.

A toxic ghost town sitting atop a massive coal fire.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.