This elevator was built in 1907 to connect two neighborhoods separated by a steep, rocky cliff.

Taking the subway here means doing so over a bridge located in the middle of an estuary.

This crumbling medieval basilica once attracted pilgrims by the thousands to collect a miraculous dust that formed above the saint's tomb.

An underground network of massive stone arches and their skylit vaults support ruins of portico structures above.

Carvings in Turkey's Marble Road may have directed ancient Romans to a hidden brothel.

The ancient latrines of the Greeks, in all their public glory.

A charming beach town in Turkey captures all the colors of the rainbow.

Climb a steep hill in 90 seconds on the second-oldest urban subway in the world.

A deadly ancient portal to the underworld.

A marvel of Byzantine engineering under the streets of Istanbul.

A small etching on the white marble parapet was written in runic script by a Viking mercenary.

Roman ruins top white travertine terraces formed by ancient hot springs.

The only surviving prototype of Buckminster Fuller's revolutionary car.

The arch that celebrated the completion of the Lincoln and Victory highways.

US-50 in Nevada is known as "the Loneliest Road in America," but this earlier iteration of the route is even lonelier.

These markers are used to determine the ground stability of the Strip.

This sign designates the road that leads to the infamous Area 51.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

Experience a charming 1930s version of "infotainment."

In the middle of a remote desert town is a surprisingly opulent hotel.

A mining town once rife with murderous disputes over its copious treasures now creates income as a popular spot for photo shoots.

An eatery for UFO seekers on the Extraterrestrial Highway.

The drama of nature in full effect in this Nevada State Park.

The longest living non-clonal organisms on Earth.