Inside the Bangor International Airport is a collection of military challenge coins.

The site of one of history's most indelible and horrific tragedies.

Beautiful stained glass depictions of the history of human flight fill this surprising chapel.

Although built to generate electricity for Marylanders, this dam has become an all-you-can-eat buffet for American bald eagles.

A well-preserved example of an early industrial operation in the northeastern United States.

Visit a fourth-generation farm and museum dedicated to everyone's favorite fungi.

An eccentric priest's tribute to George Washington, this chapel tells the story of the American Revolution.

This splendid Versailles-inspired mansion has the largest French-style formal gardens in North America.

The smallest and oldest covered bridge in Delaware.

The highest point in Delaware is located under a trailer so this marker across the street will have to do.

The longest covered bridge in Delaware.

A converted hangar displays dozens of helicopters, from a famous 1943 rescue chopper to several autogyros.

These lush botanical gardens employ the most purrfect pest control force.

A local prank turned town icon.

Steepest flood safety railway in the entire world.

Memorializing an American tragedy of massive proportions.

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

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

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

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

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

Yo, Adrian!

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

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