360° views of the city plus five floors of optical illusions and hands-on science.

A former fisherman's hut deemed too small for habitation is now a delightful tourist draw.

A real-life Professor Snape once taught in this Welsh university building, which students of course nicknamed “Hogwarts.”

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

Three columns of volcanic rock shoot out of the ocean.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

Medicinal spa created with the discharge from a geothermal energy plant.

The highest peak in Wales is said to be the final resting place of a giant killed by King Arthur.

A subterranean playground in an abandoned slate mine.

A 19th-century funicular railway shuttles visitors up this surprising sea cliff to one of the world's largest camera obscuras.

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

A small village in two different countries.

There must be a pun in this haystack somewhere...

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

A rare example of World War I trenches from the British front.

Macabre astrological automaton clock dating to the late 1400s.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

Famously misunderstood wonder of the ancient world

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.