Climb right into the heart of this colorful Iceland volcano.

This oceanside Reykjavik spot is speckled with recycled sculptures and large stones.

Obelisks and stone pineapples in the Irish countryside.

A nun spent 16 years painting the stunning Celtic mural that covers the interior of this WWI memorial.

The only natural cave bath in all of Europe.

A contemporary art installation housed within a Gothic cathedral.

This historic electric train has operated with regularity since the early 1900s.

This enchanting Victorian estate was home to the world's first hydroelectric power generator.

Monty Python fans will recognize this abandoned mine as the Cave of the Killer Rabbit of Caerbannog.

The location of the Bridge of Death and the Gorge of Eternal Peril in "Monty Python and the Holy Grail."

This massive, 30-foot-tall statue of the famed Scottish knight overlooks a grassy knoll.

The heart of a Scottish legend had a centuries-long journey before reaching its final resting place.

A sculpture of a beloved local figure, who tipped his top hat to everyone he passed on the streets of Bratislava.

Admire dozens of life-size animals made from old scrap metal, nuts, screws, and valves.

The ruins of a 12th-century seaside castle on the southwest coast of Scotland.

The oldest natural aquarium in the United Kingdom.

Dating back to the 500s, these stones include some of the oldest Christian memorials in Scotland.

This 900-foot structure with 20 arches crossing a Scottish river was built in the late 19th century.

Believed to be the birthplace of John Balliol.

Carved between 3500 and 1000 B.C., the distinctive carvings at this site are poorly understood.

This unusual sculpture is sometimes partially, sometimes fully, submerged.

A 30-acre garden inspired by the principles of modern physics.

An optical Illusion once believed to be an electrical phenomenon.

This modern labyrinth lies in the shadow of a ruined medieval castle.