An ancient holy well said to be used by the patron saint of sailors and travelers, lost in the boggy west of Valentia Island.

The ruins of an 800-year-old monastery boasts the tallest round tower in Ireland.

An abandoned faux-pub made famous by a Guinness commercial.

One of the largest Buddhist stupas in the world keeps an eye out in every direction.

At the tallest peak in Colorado, an electrifying mix of thin air, lightning, and rivalry.

The oldest inn in Kilkenny was established by the first convicted witch in Ireland.

The world's longest outdoor covered escalator system transports commuters through Hong Kong's hilly terrain.

This single room has survived the centuries with almost no deterioration.

Last stop before the top of the highest peak in the world.

Jumping-off point for a climb up Mt. Everest is the most dangerous airport in the world.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

Twice a year, visitors can tour the desolate site that birthed the Atomic Age.

Sacred Buddhist home of some spiritual monkeys.