Cannon designed to fire an atomic warhead.

The iconic remains of the original Academic Hall that burned down in 1892.

The obelisk meant to mark the founding father's grave at Monticello is actually on the University of Missouri campus.

Metal sculpture folk art lining the Kansas Highway.

Its unique collection details the history of the state's svelte railroads.

This titanic oil company sign is a reminder of the Americana boom of the 1970s and also its commoditization.

Look closely and you’ll notice that the color changes a third of the way up the tower.

The original vault that held the president's remains still stands, empty, not far from where he was finally buried.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

This crumbling Death Valley mining complex was known for its use of giant, 20-mule team wagons.

The world's largest Holstein cow.

One of few surviving standpipe water towers in the U.S.

A collection of outdoor art by renowned muralist Robert Dafford depicts the history of a flooded city.

A small town garden is dedicated to a psychic dog with the most soulful eyes.

Once a lonely sentinel on the edge of the Great Plains, this rebuilt trading fort offers a glimpse of life on the Santa Fe Trail.

One of few remaining antique carousels with stationary animals in the U.S.

The small first-floor apartment where the author wrote her Pulitzer Prize-winning book 'Gone with the Wind.'

One of the largest collections of wildlife art in the United States, built into the side of a cliff in rural Wyoming.

An adorably sweet display of sculpted Precious Moments figurines.

An Iowa town celebrates its heritage with the tallest working Dutch windmill in North America.

A hotel with a rich Wild West history of miners and bootleggers.

Sitting in the arguable birthplace of the Wild West, this museum holds the largest collection of bronco busting bric-a-brac in the world.

A true roadside icon standing on the same plains that the herds once roamed.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.