This 13th century Gothic brick castle is the largest in the world by surface area.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

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

A strange and ancient landscape hides the dark, cavernous remains of a 5,000-year-old flint mine.

A favorite with sightseers, this Norwegian funicular provides easy access to a stunning view of Bergen and its environs.

At the very tippity-top of Europe is a cliff from which you can view the midnight sun.

A serpentine highway twists and turns over the treacherous Norwegian Sea.

The wreckage of an old coastal trading vessel is only visible at low tide.

One of England's most famous churches hides a pair of little known architectural treasures.

Grotto replete with mystical designs laid out in glued shell mosaics.

A quiet memorial to those who died saving others in the heart of the City of London.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

A celebrated bandstand at the center of what was once the worst slum in London.

One part local history, 99 parts gruesome haunted house.

Historic church where a number of Shakespeare's actors are buried.

A building that survived WWII, possibly on the virtue of its name alone.

Artists and musicians now rule over this former rail station.

Following the trail of an old metro line, this scenic path is haunted by a creepy spriggan statue.

Hear the quietest sound from across the dome.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

This lush area was the site of extensive enemy bombing during WWII.

Famously misunderstood wonder of the ancient world

A harem-inspired Moorish fantasy design in a Victorian-era Welsh castle.