Ruins

A battle between nature and architecture in the Cambodian jungle.

The remains of what was, not so long ago, the world's largest city.

An ancient Egyptian temple in the middle of Madrid, Spain.

Once the most densely populated place in the world, this island is now a ghost town.

Super-heavy Nazi architectural experiment.

A walk through the historic city center, under the streets of Seattle.

One of Scotland's most important modern structures, it just made the '100 Most Endangered Sites' list.

The enigmatic and seldom visited ruins of a Mayan city-state.

Every equinox this Maya pyramid puts on a spooky ancient light show.

It houses the remains of a 17th-century version of the Titanic.

Elevated freight railway turned wildly successful urban park.

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

Stone age urban planning.

A scenic overlook of a pit mine hundreds of meters deep filled with blue water.

WWII rocket launchpad in rural Germany and site of operation backfire.

Abandoned city hidden from the world by tropical forest and isolation on the coast of Kenya.

An old abandoned mining town in The Adirondacks where Theodore Roosevelt first learned of the shooting of President William McKinley.

A mysterious air force base built to resemble a Long Island fishing village.