Romania's triumphal arch looks out over Bucharest.

A forgotten remnant of the Soviet Union, Transnistria is an unrecognized country hidden behind a heavily militarized border between Moldova and Ukraine.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

Morocco's Argania trees are infested with nut-hungry goats.

World's largest film studio, where visitors tour the decaying sets that litter the harsh desert environment.

A fortified city, home to a remaining population of five families

An Ethiopian "Jerusalem" featuring a church hewn out of a single rock.

360° views of the city plus five floors of optical illusions and hands-on science.

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

A community of artists and entrepreneurs seeks a simpler life on London's waterways.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

Where's a guy to go after a long, hard day at work?

Eighty million natural history specimens call this gargantuan museum home.

Artists and musicians now rule over this former rail station.

The anatomical-pathological collection of a man who changed surgery.

The curious underground history of keeping Paris clean.

A historic arboretum and non-conformist, non-denominational park cemetery.

Huge winged monument in the United Kingdom.

Inside a former cabaret, seven floors of erotic art.

Macabre astrological automaton clock dating to the late 1400s.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

A lone pole once used to display a man's corpse now stands empty, but the memory remains.