The most photographed house in Maine looks good enough to eat.

The world's oldest and largest museum of mass transit vehicles.

The only remaining historic maritime signal station in the United States.

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

A tiny one-room church built after one man's prayer for healing was answered.

The Pennsylvania landscape depicted by a quarter mile of mosaics made from used road signs.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

For decades, it has disappeared and reappeared as water levels rise and fall.

Locals call this magical moss-covered walkway the "Emerald Path."

Dozens upon dozens of boulders engraved with scripture tell the story of one man's troubled life.

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

This secluded walking trail is a hidden gem of a Pittsburgh park.

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

The Master of Magnetism dominates the walls of a scrap metal yard to keep graffiti artists at bay.

The legacy of baseball great Roberto Clemente is preserved in a retired Pittsburgh fire station.

A private residence adorned with a gorgeous mural dedicated to the buzzing insect.

This eccentric mansion museum holds a impressive collection of rare and automatic instruments.

Hundreds of protractors affixed to surfaces all over the city.

Once used to screen films for theater owners to rent, this historic building is now a start up hub.

Pittsburgh's literal underground railroad.

This plaque marks a place where one of Hollywood’s most famous dancers got his start.

This shrine dedicated to the Virgin Mary is also a tribute from a mother to her fallen son.

A unique workspace where offices reside on pirate ships and inside gingerbread houses.

A preserved 18th century homestead in Western Pennsylvania marks the spot where the Whiskey Rebellion began.