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

The highest point in Washington state is a volcano covered in glaciers.

This metallic stampede sits frozen on a Washington ridge yet the artist's vision is still incomplete.

Over 75 historically themed murals grace the walls of a small Washington city.

A Boeing mechanic and his wife leave a whimsical, stone sculptured garden as their legacy.

A glimpse into the "Logging Capital of the World" at a time when there was far more forest and far less machinery.

The bat-covered home of one of the world's most popular brands of rum is located on a tropical Art Deco campus.

Bird dung painted this huge boulder which in turn inspired the name of a city.

Two massive rock outcroppings on the Oregon coastline.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Famously misunderstood wonder of the ancient world

The longest hedge maze in the world.

The winter home of millions of migrating monarch butterflies.

Only known mainland rookery of the threatened Stellar sea lion.

The first North American landing spot for James Cook on his third voyage of discovery in the Pacific.

Bridges, terraces, and replicas of historic structures all built of rock and petrified wood by one man.

The world's smallest drawbridge.

Storms, funding, and in-fighting have kept this Bermuda church from ever being completed.

A tropical paradise once home to space exploration and military installations.

Once a strategically imperative naval base, portions of this Bermuda dock complex now serve cruise ships.

This Costa Rican topiary park is a surreal garden of unearthly delights.

This Costa Rican chapel is the most metal church in the world, literally.

World's first "penitentiary," meant to be humane, drove men insane.