These mysterious petroglyphs in Vermont reflect a troubled history in the treatment of Native American culture.

Beautiful hillside Vermont cemetery with amazing funerary art.

One car at a time please.

Tour the world's largest deep-hole dimension granite quarry, where you can view the plant where gravestones are made and roll a ball down the outdoor granite bowling alley.

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

Inside this 150-year-old barn turned antique shop is a vast array of items for curios hunters.

The oldest surviving presidential residence in the United States.

The last remnants of Fort Pitt also hold the distinction of being the oldest structure west of the Allegheny Mountains.

This roadside stand packs 300-plus varieties of tomatoes, from "Maiden's Fire" to "Kaleidoscopic Jewel."

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

Overshadowed by quilts, the artistry of these patterned textiles went underappreciated for too long.

This stately 19th century library pushed architectural boundaries at a time when the public library movement was just taking off.

Sections of the iconic limestone columns have been left uncleaned as a reminder of the city's polluted past.

The only geyser in the state of Pennsylvania is caused by pressure from an abandoned coal mine outside of the ghost town Centralia.

An occult-y, historic hotel with the World's Largest Ouija board on the roof.

"Where the ducks walk on fish."

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

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

Journey through a collection of over 35,000 Halloween items from all generations.

South Philadelphia is home to Keith Haring's only surviving in situ collaborative public mural.

The last street in Pittsburgh that's paved with wood.

One of the oldest log cabins in America is one of the last of its kind this historic Swedish dwelling remains a piece of living history.

These lush botanical gardens employ the most purrfect pest control force.

This Philly landmark has a giant butterfly pavilion, three floors of insect displays, and withstood a $40,000 heist.