A medieval fresco which reminds visitors that death will come for us all.

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

A marble Lucifer hides behind the pulpit of this Gothic cathedral.

Once described as the "Eagle's Nest," this ruined ancient city rests on a remote mountaintop.

This subterranean necropolis holds three floors of antler-dug grave caves.

Gutted during the Liverpool Blitz, this architectural husk has been left destroyed in honor of the dead.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

This historical Netherlands fortress still bears the marks of its single siege.

Founded over a thousand years ago, this shrine is said to be built on the site of a warlord's harem prison.

The remains of this ancient fortress atop a manmade hill look as though they were built into a volcano.

The deepest underground city in Turkey was designed to protect 20,000 people behind massive stone doors.

As can be expected from a centuries old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

One of Catholicism's four major basilicas has a series of papal portraits that are said to predict the end of the world.

One of the largest caverns in the world has a maw large enough to stack cathedrals in.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

This sawtooth mountain range still bears the strangely lovely marks of its history as a medieval quarry.

Underneath the city that invented pilsners are a series of historic tunnels that have been storing beer for centuries.

This Costa Rican topiary park is a surreal garden of unearthly delights.

This weird abode has inspired everything from the "House On Haunted Hil" to a robot hunter's pad.

This modern monument to pagan belief looks like it was transported straight from ancient times.

Thirteen sculptures in central Moscow graphically depicting vices of the modern world.

This small group of sand dunes manages to pack in a strange rainbow of colors.