These dramatic cola-colored falls have appeared in a poem by Henry Wadsworth Longfellow and a song by Sufjan Stevens.

A precariously balanced rock perches on the edge of a cliff created tens of thousands of years ago by glacial erosion.

The Victorian-era greenhouse is stuffed with tropical plants, and open 365 days a year.

Watch the ships come in on Michigan's 210 ft. high observation deck in Sault Ste. Marie.

Beautiful scenery, history, science, and physics come together in this remnant of shipping lore.

These unusual rooms on wheels are holdovers from the 1960s.

D.C.'s first central library was born out of a chance encounter with the philanthropist whose name it bears.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

The hidden offices underneath Memorial Bridge have been locked up since 1976.

The site of a 19th century "dream city" that almost rivaled Chicago before being swallowed by the Indiana sand dunes.

Largest tulip festival in America, includes fireworks, a parade, and a carnival.

In this quiet park a rendition of a classic painting graces the outside of a charming restroom.

This is the last hand-cranked chain ferry of its kind in operation in the United States.

With well over 130 falls and cascades to brag about, Hamilton, Ontario has earned its stripes as the waterfall capital of the world.

Spectacular mineral formations fill these caves, which have been used for everything from smoking meat to stashing illicit liquor.

Near-constant high winds deform the trees on Spruce Knob, the highest point in West Virginia.

She stares out across six lanes of traffic, clutching a musket and infant with determination.

A spectacular tribute to statesman and philanthropist Andrew Mellon.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

Washington's iconic carousel has a nice piece of Civil Rights history.

The oldest continuously occupied public building in the United States.

A small collection of iguana-infested ruins hides amid Cancún's bustling hotel zone.