Accessible only by boat, this centuries-old island fort never saw troops or combat.

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

Meet your friends, marry your true love, or tell your enemies to kiss your butt under this historic Pittsburgh timepiece.

When oil was discovered just outside of Pittsburgh, the city became home to this regional stock market.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

A portion of the old Pirates stadium over which a defining home run once flew still stands even after the rest of the stadium was torn down.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

There aren't too many operational funiculars around, but Pittsburgh has two!

A tribute to the pop culture icon overlooks this Washington D.C. intersection.

Used as a military post in three different engagements, this fort has remained incomplete and unfired upon for nearly 200 years.

Based in a former haberdashery, Florida’s oldest continually-operating bar has a rich nautical history and lots of local lore.

Amelia Island’s oldest independent bookstore is a cozy oasis for literary exploration.

A century after his death, this covered bridge still calls to mind the plein air painter who loved it.

A giant telephone commemorates the last "crank" call ever made in the U.S.

A 200-year-old bar with a cheeky name claims to have served Edgar Allan Poe his final drink.

Public opinion is still divided on this enormous sculpture in front of Baltimore's Penn Station.

Measuring approximately 200 feet long, Swampy is the world's largest alligator-shaped building.

Rusting away on the edge of New Jersey are the remains of a Cold War missile launch site.

This small fort played a huge role defending Puerto Rico’s capital city.

The bat-covered home of one of the world's most popular brands of rum is located on a tropical Art Deco campus.

This colorful gate stands as an entrance to the walled city of Old San Juan.

It was an experiment to prove that glacial boulders and rocks can be used in constructions and dwelling.

The last remaining Shaker community still practices a uniquely communal and utopian version of Christianity.