A trading post in the North Pole where children send letters.

Four-story concrete hotel never opened to customers.

The king of U.S. high points towers over every other peak on the continent.

A church filled with the bones of hundreds of virgins martyrs—or so they say.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.

This lurid German fountain plots the sad course of marriage from dating to death.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

This singular Irish dolmen is more Frank Lloyd Wright than upright stonehenge.

A remarkably intact castle that once was the largest in Ireland.

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

Known as the "Cross At The Crossroads," this massive metal cross is just short enough to avoid the FAA.