An unrealized dream to wirelessly electrify the entire Earth.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

1,001 carved statues of the Buddhist God of Mercy, each with a unique face.

The site of London's first coffee house has been serving refreshments of one kind or another for 360 years.

Banksy gives themself artistic license with this piece of London street art.

A cluttered and astounding collection of antiquities and curiosities.

The final resting place for the remains of 143 Habsburg royalty.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

A surrealist timepiece by the artist of melting clocks.

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

Abandoned medieval hill town.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

Underneath this small church are 15,000 bones, arranged by an obsessive academic.

The underground sanctuary of a mysterious ancient cult.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the century.

Geothermal waterfalls in Tuscany.

Standing proud atop a Turkish bluff, this Ottoman palace has retained its grandeur despite being abandoned for centuries.

Mausoleum and Holy Seat of Antiochus I of Commagene.

A Turkish monastery tucked into a cliff wall.

A Lycian city of the dead carved into the hillside of Southern Turkey, complete with startlingly human touches.