This striking otherworldly landscape outside Angola's capital city is the product of millions of years of erosion.

According to legend, this bell once belonged to a kingdom now lost beneath the waves.

This sculpture was designed to encourage viewers to be true to themselves.

Believed to be the first museum dedicated to the films in the world.

Historical structures and natural wonders await visitors to this preserve.

This makeshift concrete bunker is an unusual reminder of the Cold War.

A burial ground for workers at one of Hawai'i's largest sugarcane producers that laid buried for decades.

A beautiful red-faced slot canyon in northern New Mexico.

The remains of a failed attempt to regulate Mitchell River.

A natural sandstone bridge hidden in the Sewanee forest.

This fortified L-shaped tower is the ancient seat of clan Hannay.

This salt lake in South Australia features seasonal color changes and its very own loch monster.

A 13th-century stronghold that has fallen into ruin.

A tiny metropolis resides inside this student housing complex.

This hiking/biking/horse trail along an old railroad grade features trestles, tunnels, and a roadless stretch through the scenic Susan River canyon.

In the middle of a New England forest sit the crumbling ruins of World War II-era ammunition storage bunkers.

Near this coastal cave stands a small memorial to the hermit who made it his home for three decades.

A gap marks the spot where a now-missing stone once completed the circular arrangement at this Neolithic site.

The remains of a once-famous hotel that also acted as an artist colony.

This 900-foot structure with 20 arches crossing a Scottish river was built in the late 19th century.

This massive statue of John Muir on the side of a California highway was carved from a redwood tree.

This unique rock formation has become a popular walking trail.

Though it won't take you far, the wood train housed at this station is the last of its kind in Japan.

One of Mexico's youngest major cities still holds on to this structure representing its short modern history.