This 90-year-old building is home to possibly the most New Englandy social club in existence.

The whole of Maine's history with the salty little fish is packed into this tiny coastal museum.

Every plane, auto, and bicycle in this collection is kept in working order and are regularly demonstrated to the public.

An elderly widow still operates the incredibly detailed model railroad she and her husband built by hand.

Old submarine parts have been converted into faux whale fins.

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

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

A hidden subterranean installation offers a view of the sky.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

The artist James Turrell is repurposing an extinct volcano crater as an observatory to experience the cosmos.

In the remote high desert of New Mexico, a strange array of poles beckon fury from above.

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

The longest navigable underground river in the United States is home to countless blind and albino animals.

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

An acoustic anomaly with a mysterious cause.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

Mysterious rocks that ring musically when struck.

The rocks in this arid basin leave trails of movement behind them.

Enormous lake at the bottom of a unique cave system.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

The United States Capitol's former columns still stand.

An old vending machine serves up unpredictable beverages from its seemingly magical insides.

An enormous, inside-out glass globe built in 1935.