This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

A monthly street "service" of handmade puppets and live original puppets, whose devotees profess has the power to change lives.

The prototype for all Nazi concentration camps.

Don't be fooled by this fake medieval facade even if it is almost 300 years old.

This tiny church near Sleepy Hollow contains Henri Matisse's last work, a rose window, and nine windows by Marc Chagall.

The experimental test tracks of a retro-futuristic monorail still stand in the French countryside.

Empty, but not abandoned, this cavernous Brooklyn loading dock was once considered the largest individual building in the world.

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

By day this New Orleans square is for pedestrians, but by night it is a kingdom of kittens.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

A ruined mansion hidden in the woods of the Hudson Valley, home of a tragically doomed romance.

100 massive sculptures in the Hudson River Valley.

The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

A bygone village occupation lives on via this quaint public chalkboard.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

Possibly the world's largest coin stands just outside of a Canadian science center.

Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

This strange bovine gargoyle is said to have been put in as a passive aggressive form of revenge.

A beautiful geyser under environmental threat.

Home to the deepest rift anywhere on Earth.

The first evidence of some of the Earth's earliest life was found in this fossilized undersea grotto.

Geothermal waterfalls in Tuscany.

Huge masonic hall in Philadelphia with lavishly themed rooms.

This study room in the New York Public Library saw the creation of one of contemporary America's greatest traitors.