Former villa and estate of James Deering developed to preserve native tropical forests.

Two men built this castle on the Florida coast as an artistic “landscape sculpture.”

Given just one more year to live, Conrad Schuck built his dream house in Bartow, Florida.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

Elevated freight railway turned wildly successful urban park.

An unoccupied lighthouse encased in layers of ice from the waters of Lake Erie.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

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

Remembering the Alamo with a full-scale replica of the 1836 city.

A Texas cave network is home to some of the world's most spectacular-looking and bizarrely named mineral formations.

The Grand Canyon of Texas.

The world's largest squirrel statue clutches a pecan bigger than your head.

Visitors can walk over the largest concentration of Columbian mammoths to have died from one event.

A recreated Stonehenge stands in a country field, complete with Easter Island moai heads standing as sentries.

A Victorian mansion, painstakingly reproduced to appear just as the the Munster's family home did on TV.

An ancient instrument used to measure the waters of the Nile so Egyptian farmers would know whether to expect famine or flood.

In an isolated field near a dilapidated barn stands this chilling portrayal of the plight of the Nuba peoples of Sudan.

An annual extravaganza of Broadway theater memorabilia.

The burial place of an obscure North African saint was turned into a macabre body preservation factory for the 17th-century Neapolitan elite.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

Connecticut grave of the woman responsible for the Winchester Mystery House in California.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

In the ruins of Glastonbury Abbey lies the alleged resting place of the legendary king.

One of the last remnants of the Bessemer process that revolutionized steel production during the industrial age.