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 king penguin is a knighted brigadier of the Norwegian Army.

Large-scale contemporary artworks tower over fields and lurk in forests around a Jacobean manor house.

One of Ireland's most infamous prisons for rebels including men, women and children.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

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

A statue in the center of Dublin dedicated to one of their favorite sons of rock & roll.

A mysterious plaque to the even more mysterious "Fr. Pat Noise," killed in "suspicious circumstances."

A guitar mounted on a wall in Temple Bar honors the Irish musician.

This huge concrete map of Scotland was built as a thank you gift from a Polish soldier.

Possibly the oldest living thing in Europe, more likely a pagan survivor.

An exceptional engineering feat that facilitates the migration of salmon upstream during their breeding season.

Scotland's only funicular railway is also the United Kingdom's highest.

A glacial pothole was once a hideout for a notorious Scottish outlaw.

This brilliant display of whirling fireballs celebrates Hogmanay.

A series of mysterious metal artwork adorn this harbor walkway.

The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

The remains of a grand castle that may have inspired Bram Stoker's Dracula.

A dozen cast iron leopards stand guard along the length of Aberdeen's Union Bridge.