Built by the Ancient Greeks, this chariot bridge is still in use today.

Modernist design and funerary customs meet Spartan traditions in this one-of-a-kind graveyard.

View the ancient remains of buildings and the ancient "River of Hades" before hopping on a train.

This wrecked ghost ship has been rusting on a Greek beach since the 1980s.

Mausoleum and Holy Seat of Antiochus I of Commagene.

Standing proud atop a Turkish bluff, this Ottoman palace has retained its grandeur despite being abandoned for centuries.

A Lycian city of the dead carved into the hillside of Southern Turkey, complete with startlingly human touches.

This church houses the tomb—but not the remains—of St. Nicholas, the likely progenitor to Santa Claus.

A mysterious ancient cemetery with Roman sarcophagi and Lycian inscriptions.

More than 100 monumental tombs carved into rock are preserved at this ancient Nabataean site in the Arabian Desert.

No one knows how many bodies are in this vault in a Chicago public park.

Once described as the "Eagle's Nest," this ruined ancient city rests on a remote mountaintop.

A little-known caravanserai hidden among farmhouses in the Turkish countryside.

This lonely tomb is all that remains of a once-bustling ancient trade hub visited by Marco Polo.

Groups of prehistoric tombs that dot the mountains of northern Oman.

A medieval bridge stretches over a sulfur-rich river that leads to year-round natural hot springs.

The damming of the Colorado River buried an iconic geologic formation before record-breaking drought brought it back.

Extremely isolated Silk Road caravanserai in the middle of nowhere.

An exquisite example of Uyghur Islamic architecture.

The world's largest natural arch was forgotten for over 50 years after its discovery.

In the Shawnee National Forest, amazing rock formations peer through the treeline.

A small cemetery chapel designed by Frank Lloyd Wright and built in 1906.

Designed by Alfred Caldwel, this landscape showcases his vision of a native garden.

This historic house museum that celebrates one of the world's most influential social reformers is also one of the most haunted locations in Chicago.