This quarter-mile tunnel under the Bluff in Pittsburgh bends at a 45-degree angle.

Outside this souvenir shop is a statue of Bigfoot composed of volcanic ash, and plenty more to see inside.

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

An extraordinary mixture of natural beauty and man-made phenomena.

Boats and fish both find their way through this massive hydroelectric structure.

This rare, carefully curated collection showcases the history of neon inside a grandiose Elks lodge.

A massive sea stack famous for its appearance in The Goonies.

A careful eye can find hundreds of dinosaur tracks running along the Connecticut River.

An old trolley bridge was converted into a breathtaking garden bursting with colorful flowers.

Over 50 whirling pools left behind from the glacial age.

3,200-square-foot mural inside Dartmouth Library depicts the history of America with images of human sacrifice, ancient gods, and other unspeakable terrors.

Panoramic views of the city of New Haven and the Long Island Sound, with a side of history.

The Teenage Mutant Ninja Turtles stop thieves at the site of a historic 1876 bank robbery.

This college campus garden is home to generations of award winning flowers.

This roadside attraction attracts kids with dinosaurs before blindsiding them with geology.

This rare symbol of Eastern philosophy in the West has been created over years of painstaking construction by the local community.

Books you don’t need in a place you can’t find.

This tall Massachusetts folly got its name thanks to all of the purple prose its vistas inspired.

Taxonomy experiment known for quirky collections.

This abandoned neighborhood is now a park filled with beautiful trees, wildflowers, and hints of its past.

A toxic ghost town sitting atop a massive coal fire.

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

The only geyser in the state of Pennsylvania is caused by pressure from an abandoned coal mine outside of the ghost town Centralia.

An electrifying collection of gadgets and literature from the 16th through 20th centuries.