Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

A hugely vast Irish landscape of barren rock that stretches for miles.

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

This neon landmark has been posing this deadpan question to follicly-challenged Dubliners for over 50 years.

This modest plaza in Moneygall, Ireland has cashed in on its distant connection to the U.S. president.

Ireland's most remarkable collection of these curious cone-shaped houses is worth the buzz.

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

Traveling this mountain pass reveals quaint stone buildings, stunning Irish scenery, and a bridge said to grant wishes.

This natural Icelandic fissure allows divers to swim right between two volatile tectonic plates.