This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

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

A layered tribute to the work of mosaicist Isaiah Zagar.

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

This 17th-century place of worship still celebrates holidays in the traditional Swedish fashion.

On a remote island in the northern reaches of Lake Michigan, a museum of collectibles collides with a vintage toy store.

A blend of art, antiquities, and Americana fill this museum, surrounded by whimsical, enchanting gardens.

The meeting of the northwestern corner of Delaware, the northeastern corner of Maryland, and the southern edge of Pennsylvania.

The US Navy's only submarine museum is also home to the world's first nuclear submarine.

This elaborate tunnel is the first structure composed of cast concrete in the United States.

Housed in a 1912 architectural masterpiece, this outlet of the Golden Arches is a real beauty.

Every winter, the wind carves blocks of frozen water into beautiful abstract shapes inside this unusually curved tunnel.

What appears to be a wizard's lair in Milwaukee actually houses a massive water pipe.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

Eclectic collections, artwork, and some feline friends fill the writer's former home.

This homegrown adoption center offers a wonderland of feline companionship.

By day this New Orleans square is for pedestrians, but by night it is a kingdom of kittens.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

The restaurant keeps a hidden séance room on the second floor and reserves a table for the spirit of the former owner each night.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

The oldest still-operating tavern in the United States was once owned by a pirate.

Eco-friendly island mansion.

You can spend the night as an honorary lighthouse keeper in this quaint, historic beacon.