The remnants of the fortress that saved Georgia from the Spanish still stand guard on their swampy island.

Oddly shaped rock formation, misassociated with a nearby utopian community.

A replica that won't float away.

One of Europe's oldest libraries.

J.R.R Tolkien, C.S. Lewis, and other "Inklings" met at the Oxford pub to discuss the now legendary fantasy stories they were writing.

A harem-inspired Moorish fantasy design in a Victorian-era Welsh castle.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

Fortified medieval tower house with lovely roof garden.

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

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

Iceland's largest lagoon is home to stunning multi-colored icebergs.

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

The fairy tale castle of the "fairy-tale king."

Bridge that died in war and was resurected.

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.

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

The summer tourists on these cliffs are thousands of seabirds.

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

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

When ecosystems collide in the arid Southwest.

Largest man-made excavation on earth!

Sections of the iconic limestone columns have been left uncleaned as a reminder of the city's polluted past.