A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

The oldest active church in Pennsylvania is also the second oldest Swedish Church in the United States.

One of Philadelphia's largest murals resides hidden under this bridge.

This 19th-century Hamptons windmill was once home to modernist painter Agnes Pelton.

A mysterious air force base built to resemble a Long Island fishing village.

This outpost of America's most popular fast-food restaurant is housed inside a palatial mansion.

A former poultry store that looks like a giant duck and is one of the "seven wonders" of Long Island.

This stone tower marks a lookout point over the historic Washington Crossing, and maybe some buried treasure.

This giant disembodied horse head seems to balance impossibly on its nose.

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

Yo, Adrian!

The origin of this mechanical boy was a mystery until he revealed his maker by writing it in perfect cursive.

America’s smallest national park site is the former residence of exiled Polish national hero Thaddeus Kosciuszko.

Known as the “Official Greeter of Juneau,” this dog still welcomes ships and their passengers to Alaska.

A collection of 11 million buttons illustrates the human toll of the Holocaust.

The world's third-largest scale model of the planets.

Steel remnants of a bridge make up a unique sculpture along the banks of the Illinois River.

Railroad officials in the early 1900s sought to spare travelers the sight of Roman soldiers’ private parts.

A renowned Civil War veteran, this Bald eagle now presides over the Wisconsin State Assembly.

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

What was meant to be a temporary exhibit is now a permanent fixture at the St. Louis Zoo filled with beautiful birds.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

Less a museum than a bizarre fantasy world created by artists and engineers.