This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

Turnip-shaped island just off the Michigan shore in Lake Huron.

A collection of weird and wonderful art fills a former houseplant nursery.

One of Belgium's oldest hospitals saw patients from the 13th to 20th centuries before becoming a museum.

A 141-foot wave of crashing lumber guards the entrance to the Grand Place in Mons.

This Belgian palace was long the domain of priests and aristocrats but is now being turned into an art commune.

This collection of solar timekeepers includes the world's first digital sundial.

This whimsical statue dumps water on its head to symbolize knowledge flowing into his brain. Or maybe booze.

A once-magnificent collegiate church is falling into ruin.

This narrow Ghent alleyway is an officially sanctioned street art tunnel.

The "stairway to heaven" lookout tower was built to resist weather, arson, and the laws of physics.

This sprawling Belgian fort was once thought of as impenetrable but now it is simply an abandoned relic.

A marble Lucifer hides behind the pulpit of this Gothic cathedral.

This abandoned Belgian fortress is purposefully being left to nature.

A Belgian self-built tower inspired by the Bible and ancient civilizations.

Hiding the longest subterranean river known in the world.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.