This 15-foot tall obelisk commemorating the Philadelphia-Baltimore railroad connection sat neglected for over a century.

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

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

This tiny cottage surrounded by railroads is the oldest surviving structure in Fairmount Park.

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

Hidden behind West Philadelphia rowhomes is a haven for migratory and local bird species both ordinary and rare.

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

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

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

A local prank turned town icon.

One of the only single-person private gravesites in New York City.

A castle inspired by medieval architecture is hidden in the woods of Connecticut.

This scenic waterfront swimming pool is the longest salt water pool in North America.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

This giant Boston statue of Mary is standing on a globe to show her power over the universe.

Silverware in the sidewalk outside a grocery store cements this neighborhood’s Italian culinary history.

The site of Paul Revere's historic two lantern warning.

An overlooked monument to the celebrity gangster who helped put the sin in Sin City.

An enormous illuminated figure dances on the Las Vegas strip.

Temporary Burning Man sculpture made of two 18-wheelers.

Nevada's largest cactus collection stands outside a candy mogul's small factory.

A giant open-air sculpture made of over 200 full-sized boats.

A piece of the iconic wall found an unlikely new home in a Vegas bathroom.