At more than 5,000 years old, these structures are among the oldest free-standing stone buildings in the world.

After funding was cut for a memorial to the Danish author, the sculptor had his statue ceremonially lowered into the city harbor.

An abandoned fishing village in pre-oil Qatar.

A long strip of fossil-filled limestone makes up this natural bridge above a rushing stream.

Journey inside the bowels of this sperm whale sculpture.

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

The world's largest model of our planetary system.

Ancient paintings known as the "Sistine Chapel of Cave Art."

The walls of these four caverns are filled with art that dates back to the earliest human presence in Europe.

In the power of this waterfall, Alexander Hamilton saw the potential for industry.

The massive cave church of Cairo's Zabbaleen community is one of the largest Christian churches in the Middle East.

An ancient instrument used to measure the waters of the Nile so Egyptian farmers would know whether to expect famine or flood.

This ancient structure is widely thought to be the oldest intact pyramid in the world.

Egyptian treasure trove of fossils documenting the whale's transition from land mammal to sea creature.

A renovated hotel is bringing new life to a nearly-abandoned mining town in Colorado.

A square stone tomb marks the spot where six men were killed while holding a service in Caldoris Wood.

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

Indents in the pavement are all that remain from a grisly death machine in Paris.

An eatery in a shallow river where diners can enjoy their meal mere feet from the base of an artificial waterfall.

The yawning maw of this pagan visage is said to bite off the hands of liars.