The largest earthwork effigy in the world.

This historic train station has been converted to a locomotive themed hotel.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

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

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

Over 20,000 sets of spice shakers reveal the surprisingly telling history of our most basic spices.

This replica of the Greek structure is in the heart of Nashville.

After a water tower painting was accused of being an ad, a simple fix was made that gave the city a motto.

The world's third-largest crystal sphere has sat in the Penn Museum since 1927 with the exception of one outlandish theft.

A daily replay of the experiment that proved the rotation of the Earth.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

This elaborate towering structure was once famed for its revolutionary height.

The first American department store, and home to the largest operating musical instrument in the world.

One of the best places to see feral Colonial Spanish Mustangs in the United States.

This giant head is all that remains of a once proud statue that survived an earthquake but not a fall off of a wagon.

Visit a replica of the estate where Aaron Burr allegedly plotted a treasonous scheme against the United States.

The largest burial mound in the United States holds the remains of prehistoric West Virginians.

A small storefront museum explores the history and myth of West Virginia's famous urban legend.

Home to several unusual artifacts, including a huge painting of George Washington.

The failure of one component toppled this entire bridge during rush hour.

One of the few places where you can explore a 1918 paddlewheel steamboat from stem to stern.

An unusual, super-sized grocery adventure awaits in an Ohio suburb.

The crash of this great airship signaled the beginning of the end for dirigibles.

An obsolete, vanishing traffic device warns Cincinnati drivers away from middle-of-the-road obstructions.