A series of caves within the gorge hold artifacts from the Stone Age.

Africa's fourth longest river originates from a burbling spring in a secluded stretch of woods.

Artifacts showcasing the witchy history of Zambia.

An obelisk marks the spot where a British explorer's heart was buried before the rest of his body was transported to England.

A pre-Hispanic pyramid in the middle of a tourist district in the Canary Islands.

Mirrors and glass shards cover every inch of this arrestingly beautiful mosque.

A swing to dangle you off the very edge.

A solitary tree has grown up all alone on Lake Wānaka, backdropped by the beautiful Southern Alps.

The remains of a monument in the remote Kazakhstani desert dedicated to the only men to die in outer space, the crew of the Soyuz 11 rocket.

The oldest hotel in the world has been operated by the same family for over 1,300 years, even catering to samurai.

This subterranean disco dance club in a Cuban cave comes with bright lights and a dark legend.

Buildings from the fictional planet of Tatooine still litter the Tunisian desert.

This stunning mass of ice spans 121 square miles and is still growing.

The first museum in the world devoted to sexual gadgetry.

Looming communist pillar with a Czech twist.

The deepest hole drilled in the name of science, where evidence of Precambrian life was found.

At the very tippity-top of Europe is a cliff from which you can view the midnight sun.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

The internet as provided by a James Bond villain.

Sweden's first nuclear reactor, R1, can be visited 25 meters underground.