Occupied for six centuries by Franciscan Order nuns, this monastery is an amazing ode to Catalán Gothic architecture.

This Funeral Hearse Museum represents the finest in cadaver transportation.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

The walls of this medieval church are covered with perfectly preserved frescos, including a pristine example of the Dance of Death.

This former insane asylum now holds a pathological anatomy museum.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

Mozart's skull may be held in this collection, but definitive proof continues to elude scientists.

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

This solitary monastery may hold the remains of Vlad the Impaler (but probably not).

A small town Romanian cemetery filled with darkly humorous gravestones.

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

One of the world's largest amber altarpieces is housed within this reconstructed medieval church.

The oldest church in the Estonian capital is home to over 100 fantastical cemetery coats-of-arms.

Nordic giants resurrected from the sea and restored to their former greatness.

A haunting statue called "Eternal Silence" has quite the reputation among visitors with active imaginations.

Mounds, rune stones, and a 1,000-year-old church, left behind by Denmark's first two kings.

A Portuguese Jewish cemetery filled with stunning grave monuments that date back to 1614.

A very peculiar and macabre statue calls Tugatog Cemetery home.

Legends, sculptures, and unique tombs can be seen lurking in these connected cemeteries.

Nature is slowly overtaking this disused cemetery on the outskirts of Brussels.

The crypt under this cemetery's chapel was used as a meeting place by Filipino revolutionaries.

Is there such thing as too many fruit bats? Not anymore.

An abandoned railroad tunnel is now filled with bioluminescent bugs.

A galaxy of glowworms—larvae of a gnat—hides deep in the belly of these caves.