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

The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

Northern Ireland's Brobdingnagian stepping stones.

The atmospheric road was never meant to be so creepy.

A museum marks and documents the site of the Titanic's launch.

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

This historic timepiece is thought to be the only public clock in the world that keeps lunar time.

The attic of a four-century-old canal house hides a clandestine church.

Unsurprisingly, Holland is home to one of the most magnificent flower gardens in the world.

Ordinary art transforms to extraordinary thanks to locals' quirky sense of humor.

This unusual piece of Renaissance art depicting the bodily horror of crucifixion and skin disease may have been inspired by fungus-induced hallucinations.

A French artist's vague warning hangs over Belleville.

This museum houses an imposing skeleton army comprised of creatures great and small.

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

Remains of Roman amphitheater hidden in a sleepy quarter of Paris.

This crumbling, graffiti-covered mansion sits tantalizingly within reach of the proletariat who frequent a public park.

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

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

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

Copenhagen's celebrated theme park and gardens.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

Elaborate tile work in this railway station tells the story of Portugal.

A unique seaside cave where Aleister Crowley faked his own death.