A massive sea stack famous for its appearance in The Goonies.

An alley covered with 20 years of bubble gum.

A solitary arbor with a unique pedigree.

Nature took her revenge on the "Wickedest City in the World."

Once owned by the largest employer in Colorado, these ovens have been abandoned for over a century.

Mural made of 100,000 pieces of hand blown glass, and one of the largest glass murals in the US.

Alexander Hamilton’s creation caused quite a bit of controversy.

Trace the history of the nation’s early days at the site of America’s oldest stock exchange.

Believed to be the birthplace of the United States Marine Corps.

An Irish Memorial commemorating those who perished due to potato blight.

One of the oldest of its kind.

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

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

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

Yo, Adrian!

Climb inside an iron crystal magnified 165 billion times its normal size.

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

Find your state fair food favorites all year long.

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

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

The longest covered bridge in Delaware.

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

Many of the most significant figures in American history once hopped on a stagecoach in this alleyway on their way to more noteworthy destinations.

Delaware's first railroad lasted only five years and spanned only 16 miles, but its ticket office has survived for two centuries.