Naturally formed rock city in Poland.

The site of the first battle of World War II.

A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

Real bones which are said to have belonged to a Polish dragon.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

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

Countless stories attempt to explain Poland's mysterious J-shaped trees.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

Art becomes an enchanting part of the environment at this wooded sculpture park.

In downtown Oslo, a menacing and terrifying relief clings to a church wall.

Research station devoted to mysterious floating lights seen in a Norwegian valley.

For six months of the year, three giant mirrors direct a pool of sunshine onto this otherwise occluded town.

A Viking-style brewpub named for a Norse sea giant, in the heart of fjord country.

An artist's mausoleum with a haunting echo.

One of the most breathtaking railways in Europe also takes one of the steepest climbs, from fjord to mountain plateau.

Walk behind a 50-meter-high waterfall.

An intricately carved Viking church overlooks a glistening fjord.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

The convergence of two currents makes this a surprisingly pleasant getaway in the Arctic Circle.

This giant boulder is pinched over a 1000-meter abyss by two mountains.

Walk 2,300 feet above the ground on the "Troll's Tongue."

This hotel was once home to a steamliner company and became the final rest stop for Europeans heading to the New World.

Remarkably preserved body discovered in a peat bog.

A bizarre form of natural mummification was discovered in the church of this Frisian village.