Rivers of cattle blood gone, a strange Escheresque building remains, the last of its kind.

Massive fortress bastions in the desert of Cholistan.

Reputedly haunted sandstone necropolis with exquisite stone carvings.

The Great Wall of Sindh, Pakistan's mighty fort.

Beijing's version of Disneyland, completely abandoned, mostly destroyed.

Ancient artists in the middle of nowhere.

World War II-era Nazi compound nestled in the Santa Monica hills.

A trash dump made beautiful by nature's power.

This extraordinary geological oddity resembles human-made pavement.

Beatlemania is still going strong... at least in Kazakhstan.

Extremely isolated Silk Road caravanserai in the middle of nowhere.

Known as the most dangerous bridge in the world, the Hussaini Hanging Bridge is only one of many precarious rope bridges in Northern Pakistan.

The kind of mixed-up place that drives archaeologists crazy.

Native Americans built this circle of stones, which was used to predict astronomical events.

The ship that got left behind.

World's first "penitentiary," meant to be humane, drove men insane.

Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.

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

Hoax, mistake, or evidence of dinosaurs in human times?

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

A battle between nature and architecture in the Cambodian jungle.

The largest earthwork effigy in the world.

Read a book next to a Midtown waterfall.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.