Northern Ireland's Brobdingnagian stepping stones.

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

The oldest church in Iceland is one of the few to feature ornate decoration.

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

This elegant arc of a waterfall marks a religious turning point.

The most powerful waterfall in all of Europe.

Strange rock formations tower above the river that snakes through this enchanting Icelandic canyon.

Walk in the footsteps of the gods and straddle two tectonic plates.

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

This verdant, tree-lined Reykjavik graveyard is both enchanting and eerie.

One of the oldest family businesses in Reykjavík serves lamb-based hot dogs.

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

An encyclopedic collection of mammal penises.

A particularly disconcerting tribute to Irish martyrs.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

A museum that cashes in on its infamous little people while teaching you a thing or two about the Irish fey.

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

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

One of the largest underground systems runs under Canada's largest urban center.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

Now housed in a museum, this giant pink elephant stood in downtown Seattle for more than 60 years.