A free, canine-friendly alternative watering hole near the more famous Barton Springs.

After it was swallowed by a Georgian mansion, this medieval castle remained forgotten for centuries.

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

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

Achill's most recently abandoned village dates back to to the Age of Enlightenment.

Just another ancient, mysterious Irish stone circle.

Just a few miles off the western coast of Ireland lies an isle steeped in Irish literary history.

This floating garden in the sky is straight out of a fairy tale, but the real thing is nothing short of magical.

The ancient tomb acts as a calendar that keeps perfect time.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

This museum of Hawaiian and Polynesian culture is the legacy of the last descendant of the Kamehameha Dynasty.

A beach made of semi-precious green sand on the Big Island of Hawai'i.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

Monty Python fans will recognize this abandoned mine as the Cave of the Killer Rabbit of Caerbannog.

A small island abbey is the final resting place of many medieval Scottish monarchs, including the real Macbeth.