This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

This rustic old building is said to be the most photographed barn in America.

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

A historic coal mine that doubles as a museum and tourist attraction.

Take a steam-powered ride straight out of the past on this Appalachian rail line.

The world's largest fully steerable radio telescope.

This rural community has attracted both scientists and techno-refugees due to its federally-mandated lack of technology.

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

Berkeley Hot Springs presents to you "the only outdoor monument to presidential bathing."

A monument marks the location of the first successful steamboat demonstration.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

The highest peak in the state of Vermont has some interesting features.

The sweetest graveyard in the world is filled with headstones for dearly de-pinted ice cream flavors.

Chicago's Navy Pier on Lake Michigan was a training hub for aircraft carrier pilots during WWII.

The iconic Chicago sculpture hides a beautiful and easily overlooked plaque on the backside.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

Once at the center of U.S. finance, the historic Trading Room was meticulously recreated piece by piece and rebuilt in the Art Institute.

The original Garfield station is the oldest station facility on the "L", with the station house dating from 1892.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

Man-made geyser that rises to the exact height of the Gateway Arch.

A blend of art, antiquities, and Americana fill this museum, surrounded by whimsical, enchanting gardens.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.