One of the oldest Jewish cemeteries in the city, it is now overgrown with an urban forest.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

A 18th century graveyard and its astonishing cortege of macabre iconography.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

The resting place of 18th century German mummies.

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.

Museum on earth sciences featuring a recreation of a famous curiosity cabinet.

Two adjoining collections of 19th-20th century physics apparatuses and instruments.

Deep under Manhattan is the largest construction project in city history. So far, the project has taken the lives of 23 workers, or "a man a mile."

This solitary gravestone is separated from the rest in Appleton, explaining why local legends continue to surround it.

The mummified heart of Louis XVII, the lost dauphin of the French Revolution.

Two gravestones clasp hands over the religious divide.

Celebrating the transformation of trash into objects of beauty.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

World's oldest and largest space launch facility, once a secret missile testing site.

Secret Soviet city once home to Russian cosmonauts and space training facilities.

This iconic Russian space museum sits on a landmark space production facility and houses the Vostok 1, the first manned spacecraft, that was also built here.

Museum celebrating the achievements of the Soviet space program.

Moscow's most popular cemetery includes the graves of numerous cosmonauts.

In oil-rich Azerbaijan, people bathe in the black stuff.

On Japan's Tashirojima Island, cats are king.

A deadly ancient portal to the underworld.

Relics given to a Manhattan church to avoid seizure by the Italian government.

Church in Manhattan holds the bloody sock of Padre Pio, among with many other unusual relics.