This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

If there is one thing you don't want to be in Sweden during Christmas, it's a Yule Goat.

This museum has a most unusual location: inside a giant, three-headed elephant.

A church of bones, decorated with 40,000 human skeletons.

The remains of diamond fever taken over by the desert.

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

Two giant painted cooling towers make for one of the world’s most epic bungee jumps.

The world's highest and most dangerous infinity pool lies at the precipice of Victoria Falls.

A gargantuan crystal kingdom.

Intensely colorful calcite pools in Southern China.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

The largest self-built castle in the U.S., six decades in the making.

Mother Nature outdoes herself with this stunningly beautiful set of caves carved into marble.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

A huge musical instrument played by the ocean.

This unique structure in suburban Austin is made up entirely of other people's castaways, and constantly changing.

Abandoned railway line circling the city of Paris.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

The Liverpool street made famous by the Beatles is real.

The quiet field that inspired one of the most famous songs of all time.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

His music once banned in Communist Cuba, John Lennon is now immortalized in bronze by Castro, who considers Lennon a "fellow dreamer."

This giant boulder is pinched over a 1000-meter abyss by two mountains.

This fantastical icy castle is built anew every winter.