This playground sculpture of an icon from the past is dedicated to the children of the future.

An abandoned network of military bunkers and tunnels open for anyone willing to descend into the darkness.

This famous bridge twisted itself into oblivion, but not for the reason you might think.

A busy cafe better known for board games than food.

One small town in the Pacific Northwest transformed itself into a Bavarian-themed tourist destination.

This long, dark tunnel is open to hikers, but those without lights are known to get confused even on the straight path.

A whimsical village of unique treehouses resides in a Washington forest.

A walk through the historic city center, under the streets of Seattle.

A giant Troll lurks under one of Seattle's oldest bridges.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.