One of its engravings is believed to be among the first representations of medical and surgical instruments.

Charnel house at the foot of Mount Sinai.

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

As the Dead Sea continues to deplete, massive sinkholes open along its banks.

The golden Buddha statue at the Wat Muang Monastery is the tallest in Thailand, and the ninth-tallest in the world.

A powerful tribute to the victims who suffered under Ethiopia's most devastating regime.

This historic observatory was established to keep shipwrecks from littering the Cape of Good Hope.

A strangely forgotten claimant to the much contested title of "Source of the Nile."

After sunset the heart of Zanzibar's historic Stone Town neighborhood transforms into a culinary playground.

These naturally balancing rocks were pictured on every Zimbabwean banknote, up to the 100 trillion-dollar note.

A public display of prehistoric space rocks is named for the Namibian village where they were found.

Tracks of ceratosaurus and Coelophysis rhodesiensis tracks can be found fossilized in the sandstone near Mt. Etjo.

The largest known meteorite on Earth was too big to move.

Unexplained bald patches in the landscape grow and recede over time, as though they are somehow alive.

Road signs in Namibia mark the location of one of the five major circles of latitude.

A desert that rolls right up to the ocean, where it's so dry animals live off the fog.

Far from the shore, this sandy victim of the Skeleton Coast looks like it was plopped in the middle of the desert.

Controversial tribute to the heavyweight champion boxer who grew up in Detroit.

The Beaux-Arts aquarium boasts a vast collection of saltwater and freshwater fish on an island in the Detroit River.

The world’s largest Masonic temple was saved by the White Stripes.

Three columns of volcanic rock shoot out of the ocean.

A formerly glacier-tipped volcano that inspired none other than Jules Verne.

Icelandic folklore says this giant boulder was ripped from the mountains and placed at its current location, where it became home to elves.

This black church sits alone among a field of lava rock.