The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.

This historic little railroad runs through some of the most beautiful scenery in Germany.

Caves famous for the dragon-slaying saint who lived there.

This small museum displays a collection of outsider art and scale models of past "treatments" for mental illness.

This Hungarian stilt village is built in a lake that never freezes over due to the power plant that that uses it as a cooling pond.

300 years of pharmaceutical history on display.

The remains of an entire Roman city can be explored in this interactive museum.

One of the largest barracks of the Austro-Hungarian monarchy's military is now an abandoned ruin.

The abandoned military base looks like a post-apocalyptic wasteland.

A centuries old castle atop a dormant volcano houses museums devoted to both women and witches.

Resting in the middle of an Austrian river, this sci-fi "island" lets people cross in neon style.

Austria's ultra-modern art museum looks like Cthulhu's giant alien heart.

Double spiral staircases are not unheard of, but they are very rare.

The personal charnel house of Anton Bruckner.

Abandoned ship reimagined as a street art canvas.

This 1776 beacon on the coast of Wales is said to have a ghost called Raymond, the last lighthouse keeper.

Quirky Welsh observatory unites art and science.

The longest and tallest aqueduct in Britain can actually be sailed across.

The enormous earthwork sculpture honors the ponies that lived and worked in the old colliery.

A hermit's tiny cell built into the cliffside that saved him in South Pembrokeshire.

The castle still holds traces of the abandoned Roman fort it was built atop.

Recently restored menagerie of Victorian-era beasts.

An authentic, seaworthy replica of the ship that sailed to Newfoundland in 1497.