This massive underground salt mine now holds a sci-fi theme park in its depths.

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

Pilgrimage site for star-crossed lovers.

David Sedaris called it "The greatest shop in the world."

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

The abandoned "Ghost Mansion" was left to decay in the mountains of Northern Italy.

This enchanting 600-year-old tree is so magical it inspired the beloved tale of Pinocchio.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

The final resting place of the poets Shelley and Keats.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

Sitting on an Italian hilltop is this surreal fortress built by the mad inventor of electrohomeopathy.

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

The middle finger of modernity.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

This aromatherapy shop and mini-museum cofounded by the Sigur Rós frontman documents Icelandic history through scents.

A fantastic reconstruction of a 10th-century Viking longhouse.

This monument to one of the largest science fiction games of all time bears the names of hundreds of thousands of players.

Travel deep inside of Europe's second largest glacier in the world's largest man-made ice cave.

This black church sits alone among a field of lava rock.

This fairytale-like structure is the last turf church ever constructed in Iceland.

This tiny museum's sizable collection is jammed into a former underground public toilet.

This replica Viking village was created for a film that was never shot and is now open to visitors.

This hobbit-y little hot spring may be the oldest spring used by humans in all of Iceland.