A diorama of the Civil War, fought by cats.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

A scenic fort on the harbor protected Philadelphia from an attack that never came.

The Decoy Capital of the World.

This English-inspired Maryland garden is home to acres of opulent plant life including bushes shaped into an entire fox hunt.

Sitting in the basement of a castle, the largest wine barrel in the world is bigger than most apartments.

The largest clock face in the United States is twice the size of Big Ben and infinitely more ad-sponsored.

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

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

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

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

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.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

An overlooked memorial honoring the local Washington residents who died in World War I.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

A rotating cast of guys and dolls in front of a Washington, D.C. building.

Before founding the American Red Cross, Clara Barton had a tremendous humanitarian impact by locating thousands of missing soldiers.

Perhaps the most scandalous statue of America's first president.

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

A line of blue paint marks the route of the inaugural parade.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

One of the most influential presidents in U.S. history wanted only this plain, elegant monument as his lasting memorial.