The largest dune field in the Mojave offers a chance of hearing the 'singing sands.'

Glass and concrete building designed by Albert Kahn.

The bones of an old zoo crumbling in the shadow of a new one.

An ornate Detroit church, left empty and ravaged by time.

Once the largest windmill outside of Holland, with enormous 114 foot sails.

Oddly shaped rock formation, misassociated with a nearby utopian community.

The artist James Turrell is repurposing an extinct volcano crater as an observatory to experience the cosmos.

A glimpse into the lives of the the Miwok and Paiute people in Yosemite National Park.

The huge granite obelisk that towers over a small California town.

Come for the speed, leave in love with the desert.

This former rail stop in Utah was abandoned, repopulated by some nostalgic friends, and now is home to a single DIY aviator who lives in a hangar.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Famously misunderstood wonder of the ancient world

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

360° views of the city plus five floors of optical illusions and hands-on science.

The crown jewel of the Queens Museum is a nearly 10,000-square-foot architectural model of the city originally built for the 1964 World's Fair.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

A 120-year oil leak slowly unleashes more gallons of oil than the Exxon/Mobil disaster.

A self-made museum in Queens, New York continues to display the work of a sculptor known for paving his own way.

Neoclassical bank designed by NY architects Helmle & Huberty.

A drawbridge named for a potentially intersex Polish national who fought alongside George Washington during the American Revolution, and an example of "Pulaski Red".

A crumbling hospital from the 1850s on Roosevelt Island.

Mysterious 500-year-old tapestries depict a unicorn hunt.