The smallest covered bridge in Maryland.

This museum explores the grim reality of life in the earliest British colonies in America.

Rowdy rebels fortified this home during the first popular uprising in United States history.

These mouldering mansion ruins remember a time when the Catskills were nothing but luxury.

The dairy farm in upstate New York where nearly half a million people gathered for three days of peace and music in 1969.

Oldest existing wire suspension bridge in the United States.

One of the U.S. Forest Service's only mansions is outfitted with a dinner table for floating food.

It would take 35 firetrucks to fill this enormous glacial pothole.

This jail which was in service for over a century is now open for curious visitors.

An Olympic hero stripped of his medals is buried in a town he never visited, which took his name after his death.

A train station that was abandoned by the coal industry and converted into a cocktail bar. Now it’s home to the local visitor bureau.

Intricate storybook scenes are tucked inside these shadow boxes, which are tucked inside a library in the Pocono Mountains.

This grisly headstone doesn’t seem to be resting in peace.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

A much-maligned monument to teetotalism.

Light bulbs, scrap wood, and tinfoil comprise this homemade throne of the gods.

Largest Roman Catholic church in North America.

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

The Corinthian columns that towered over Abraham Lincoln’s inauguration stand proud.

A massive, majestic mammal watches over pedestrians from his perch atop a former B.P.O.E. lodge.

An eponymous directional signpost erected by the first president of the United States.

This twice-relocated "Usonian" home is among the smallest built by master architect Frank Lloyd Wright.