A university observatory dome painted to resemble the beloved 'Star Wars' droid.

Germany has its very own Centralia, whose spark remains attributed to "spontaneous combustion."

Most powerful transmitter in Germany only broadcasts in the French language.

A former ironworks that was the first UNESCO industrial site.

An intricately carved Viking church overlooks a glistening fjord.

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

This record shop and unofficial black metal museum is an ode to Oslo's heaviest musical export.

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

The design of this beautifully crafted building was inspired by Norwegian glaciers.

This floating sculpture of ice is a poignant reminder of nature's power.

A former fortified tower now houses a collection of classic communications equipment.

Designed to commemorate the king's coronation.

These murals stand as reminders to the troubled history of this Northern Ireland city.

You can see three Irish counties from this Neolithic hillside fort, once the seat of the Kingdom of Ailech.

A retired military stronghold on the rolling green coast of Donegal.

This World War II relic let Allied pilots know they were entering neutral airspace.

This Italian-style temple replica has been threatening to fall off the Irish coast for hundreds of years.

A trail of "Game of Thrones"-themed doors carved from fallen trees from the iconic Dark Hedges.

A memorial to a goat culled during a foot and mouth disease outbreak guards a series of fantastical caves.

400 million years of erosion shaped these fascinating seaside caves, which made an appearance on 'Game of Thrones.'

Beautiful scenery provides the backdrop for an abandoned coastguard facility.

The lake that fills and empties itself at random.

Built in 1547, these ruins lie on a rocky promontory in Ballintoy jutting into the wild ocean waters below.

This short bridge is the only thing connecting a tiny Irish island to the mainland.