A stunning medieval castle owned and restored by the famed actor Jeremy Irons.

This inn of the court provides a fascinating window into London’s legal and architectural history.

The main residence of the Erskine family and the hereditary keeper of the nearby royal Stirling Castle.

This pyramid is dedicated to all those who suffered martyrdom for civil and religious liberty in Scotland.

There are two dozen tanks just sitting in an open field in Lower Saxony.

A decomissioned facility where the German "Transrapid" maglev trains were once tested.

A spitting ode to a German serial killer.

Eight naturally mummified bodies in glass coffins are housed in an underground crypt.

The only microgravity tower in Europe can produce nine seconds of weightlessness.

Böttcherstraße's bells, extolling Nordic virtues and the great conquerors of the world.

A stunning gilt bronze relief denounced by Hitler as "degenerate art"—even though it was dedicated to the Nazi leader.

One of the oldest wine cellars in Germany is now a restaurant beneath Bremen's town hall.

Residing along a busy thoroughfare, this sculpture urges passersby to consider the future.

This mine is home to the largest man-made hole in Europe.

The body of at least one victim of a construction accident was left behind in the collapsed pylon, buried under tons of concrete.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

An ornate and disused early 20th-century building has been given new life as a fully operational structure, complete with offices, oyster bar, and a furniture retailer.

Commemorating the landing of William of Orange with his European army on their way to the Battle of the Boyne.

Taking the subway here means doing so over a bridge located in the middle of an estuary.

This unassuming alcove in London’s famous Tower Bridge once served to capture, store, and display dead bodies from the River Thames.

This historic streetcar system has been running since the 19th-century.

A large collection of solar and night-time telescopes dot a small area on the Teide mountain range.

This monumental work of art symbolizes the coming together of a previously divided city.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.