A deadly ancient portal to the underworld.

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

An island filled with hundreds of hanging, decomposing, decapitated dolls.

Malaysia's first and only glass temple.

Steaming blood-red hot spring from hell.

Weird wax anatomical models reside here, as do other anatomical specimens.

A cemetery and the town it served sinks beneath the sea during the volcanic birth of Mt. Vulcan.

Medicinal spa created with the discharge from a geothermal energy plant.

Medical museum that houses most notably the taxidermied remains of Vladimir Demikhov's famous two-headed dog experiment.

Bold black and white motifs of life and death add a dramatic flair to this 17th-century crypt.

This former Roman Catholic Church still contains the embalmed hearts and organs of 22 popes.

A sunken idol welcomes parishioners to Davy Jones' Locker.

Reportedly 1,400 years old, this may be the first of the Fiji Mermaids.

A fifth-century temple improbably built into the side of a cliff.

The amazing wonder cabinets of a very rich Austrian archbishop.

This hospital once pioneered the use of electroencephalograms, but fell into maltreatment, abuse, and eventual abandonment.