During the summer, surfers in Alaska take advantage of this inlet’s unusual water patterns.

Running under an entire mountain, the longest highway tunnel in North America is kept fresh using portal fans and jet fans.

The ruins of a town wiped out by the second-largest earthquake in recorded history.

An Alaska livestock farm devotes itself to harvesting wool from creatures that once ran with mammoths and sabertooth tigers.

Internationally recognized group that works to protect the wolf and educate the public about its plight.

This WWII-era military installation once held an entire city within its walls - now, its walls are falling down.

This small city where almost everyone lives in the same building can only be reached via North America's longest tunnel.

The second largest waterfall by volume in the U.S., Willamette Falls is outdone only by Niagara in the amount of water that is pushed northward.

A French chateau, failed utopian community, odd museum, and Stonehenge replica in rural Washington State.

The eerie remnants of an ancient forest were hidden under the sand for centuries.

The lush coastal city of Astoria is riddled with forgotten secret sidewalks.

This lake in the Cascades lives up to its name, disappearing down a hole every spring.

The magic's in the hole!

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

A heavenly experience, right here on Terra Firma.

A beautiful 62-acre Catholic shrine and botanical garden.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

A skeleton without arms watches over the side door of one of the most beautiful baroque temples in Mexico.

10,000 flowered plants bloom in the City of Roses.

Tens of thousands of tiny birds swarm into one school chimney every fall.

The U.S. Navy's last diesel-electric submarine rests half-submerged in the middle of Portland.

A giant hilltop cross marks the location of a sanctuary with stunning views of Acapulco.