Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

One of the oldest churches in Romania is believed to have been built on the site of a pagan temple.

A giant portrait of an ancient king looms over the river.

Conspiracy theories and occult legends surround this mysterious natural rock formation.

Once an opulent Art Nouveau hotspot, the Constanța Casino is one of Romania's most beautiful abandoned buildings.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.

A small town Romanian cemetery filled with darkly humorous gravestones.

The library's graceful rotunda is like a bibliophile's temple.

Eat a Nobel banquet from any year in the basement of Stockholm's City Hall.

The world's largest model of our planetary system.

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

Just outside of Nairobi lies a large estate surrounded by endangered Rothschild giraffes, who have been fed from the window by Mick Jagger and Walter Cronkite.

Life and death are on parade at the most reliably perilous site of “the Great Migration.”

A salty red wasteland in Tanzania is a breeding spot for endangered flamingos.

The largest game reserve in Africa is home to thousands of species but refuses to house humans.

The remains of diamond fever taken over by the desert.

Ancient artists in the middle of nowhere.

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

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.

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