Built by the patriotic residents of Boonsboro in a single day.

A haunting exhibit in a wildlife refuge center highlights threatened species and the conservation efforts needed to save them.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

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

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.

The remnants of a wooden-hulled fleet built and abandoned in WWI, now home to a thriving ecosystem.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

When ecosystems collide in the arid Southwest.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

Massive still life just off the highway in Kansas.

A collection of unique outdoor sculptures surounded by the beauty of nature.

Most-visited and most-photographed slot canyon in the American Southwest.

One of 100 “Whaling Wall" murals painted in 13 different countries by a renowned marine life artist.

A recreated sign from the movie Jumanji has become a makeshift tribute to the film's late star.

A very big rock just plopped down in the New England woods.

This small shop walked so America could run on Dunkin'.

This evocatively named natural crevasse was created by a torrent of water that smashed right through a granite deposit.

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

Nature and art meet in this curvy creation