This apartment is a true time capsule of local life in Bulgaria during the Soviet regime.

One of the largest mines in Bulgaria is now home to a vast museum more than 100 feet underground.

Outstanding, eerie frescoes and decorations fill this 19th-century monastery.

A collection of art from Bulgaria's time as a communist state.

A spectacular Bulgarian cave resembling a devil's head with a waterfall rushing down its throat.

This tiny Bulgarian town offers a stunning location in the mountains and a storied history.

Bizarrely shaped rock formations in northwest Bulgaria come with equally bizarre legends.

Thousands of well-dressed mummies below a monastery.

The relics of dozens of martyrs are stored in a single chapel.

An unusual "skull with ears" sits in the crypt of this small church tucked away at the end of a narrow alley.

The burial place of an obscure North African saint was turned into a macabre body preservation factory for the 17th-century Neapolitan elite.

The Neapolitan Cult of the Dead still cares for the skulls at this mini-Fontanelle.

These "anatomical machines" are only one of the many strange items in this Italian crypt.

Gods clash with machines in a power plant regenerated as a museum.

Thousands of biblical and pagan images are carved into this small 12th-century church.

Is it an island or a volcano? That question probably explains why it's uninhabited.

The laboratory where the Soviet secret police invented exotic poisons used to kill dissidents in hideous and (mostly) untraceable ways.

Home of Vissarion, the "Jesus of Siberia."

A homemade anatomical collection of medical anomalies and accidental catastrophes.

An abandoned 14th-century castle and prison complex on a small island in the Neva River.

Ukrainian defense contractor's center for studying "pyramid energy."

Russia's own leaning tower was built on a tragic historical fable.

Site of the world's largest nuclear explosion.

300-year-old villagers houses and traditional churches preserve a nearly lost piece of Russian history.