Defy gravity at this fascinating Pyrenees overlook platform.

Holy Grotto of Montserrat Monastery holds one of Europe's mysterious black Madonnas.

This semi-secret storybook hedge maze is also the oldest garden in the city.

Mountain where Jesus was first tempted by the Devil.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Northern Ireland's Brobdingnagian stepping stones.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

The oldest pub in Ireland may also be the oldest surviving bar in the entire world.

A stunning Victorian abbey and walled garden on a lakefront.

This chimerical bridge/tunnel appears to dead end right into the sea.

Opulence and fantasy collide in this royal chair which is supposedly made with unicorn horns.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

This bridge's unique architecture honors nautical heritage and encourages self-awareness.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Just off the city’s central station hides a quaint lamp-lit alley into medieval Elsinore.

Old Danish castle immortalized in Shakespeare's Hamlet.

This striking royal residence is the largest Renaissance-style castle in Scandinavia.

Medicinal spa created from the mineral-rich runoff of a geothermal power plant

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

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

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

Three columns of volcanic rock shoot out of the ocean.

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