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

A hands-off space for graffiti artists to hone and display their skills.

France's most famous cemetery, with some of its most curious tombs.

Hindu temple of the dead home to hundreds of long-tailed macaques.

Relics of Australia's convict past, and a modern scene of unimaginable horror.

A castle hand-built by a Spanish dreamer in the Australian tropical jungle.

One of Australia's largest secondhand bookstores.

Come for the flowers, stay for the bats!

Come stay at a live-in art installation.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

Cold war icon and onetime "hole" in the iron curtain.

Steadily reminding Czechia of its past.

Monument to a suicide protesting the Soviet invasion.

Macabre astrological automaton clock dating to the late 1400s.

An old department store turned Nazi prison turned artist commune.