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

A unique botanical garden housed in three giant geodesic domes.

An authentic replica of an Asian temple and garden hidden amongst the natural beauty of Hawai'i.

Watch the newest land on the planet form before your eyes.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

Walk through row upon row of manicured miniature trees at the United States' largest bonsai nursery.

This Minnesota-shaped forest is actually located in the state it is shaped like.

When waves crash onto this section of beach, the rocks sing a song.

The famed architect designed this Minnesota gas station of the future with a lookout tower.

Despite its lavish ornamentation, and wholesome lifestyle of its devotees, this mountain commune has faced its share of issues.

Hikers can still stroll beneath the long conveyer of this abandoned mining facility hidden in a West Virginia river gorge.

This red-eyed chrome beast pays homage to the popular modern myth of West Virginia's insectoid monster.

An important piece of history from mankind's journey to the moon sits in the lobby of a government science lab.

For those going through a life transition, a place to leave behind a piece of your former self.

A rare kind of blue bear can be found chiefly in the national park that shares their name.

A high school astronomy enthusiast designed this model of our solar system to be traversed on foot.

This whimsical stacked cabin looks like something out of a children's book.

A small chapel celebrating the spiritual bond between dogs and humans.

Captain John Smith thought these cliffs were amazing in 1608 but sharks thought so 20 million years before him.

This dig site outside D.C. is known for its exceptionally high density of baby dinosaur fossils and dinosaur eggs.

The land is home to swimming ponies and a legendary 18th-century treasure.

Eighteen miniature death-scene dioramas.

This colorful theme park dedicated the official fruit of Maine serves sweet, tasty treats.

True to its name, this bouncy walkway may be the world’s smallest suspension bridge.