A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

The last municipal pneumatic post system in the world was in operation for over 100 years, and may run again.

A former squatter's paradise outside Prague.

A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

Abandoned substation turned village treasure.

Every part of this unusual home is built into the sandstone rock.

A bus with a butt and biceps to put Olympic athletes to shame.

A massive, abstract lookout tower providing a panoramic view of Prague.

A mysterious structure left behind on the Polish mountainside, sometimes called "Hitler's Stonehenge".

The largest toy museum in Poland showcases Europe's history of childhood.

On this Polish road, an optical illusion makes cars seem to roll uphill.

This fairytale medieval church in Poland originally spent centuries in Norway.

Thirty creepy ghosts now inhabit this decaying 14th-century church.

A mansion where wonders of Christmas are celebrated all year long.

A larger-than-life statue of the German revolutionist stands proud in a small town where he never lived.

Skeletons dressed in extravagant 18th century royal costumes cavort in the aisles of this German basilica.

Stockholm's last remaining paternoster elevator.

Where unreadable addresses are read, 24 hours a day, seven days a week.

A towering tribute to decisiveness stands on the spot where Brigham Young and his followers decided that this must be the place.

A hidden garden of stones engraved with scriptures, a Joseph Smith Sphinx, all carved by one man.

The world's largest model of our planetary system.

From Coke II to Google Glass, this exhibit features some of the most spectacular commercial flops.