Trace the history of the nation’s early days at the site of America’s oldest stock exchange.

A mountain pass used by Prohibition-era bootleggers to facilitate traffic into and out of Canada from Vermont.

This replica of a historic fishing shack long dubbed the most painted building in America.

A bronze sculpture on a bridge, of the shoes of 29 famous Malmöites.

Friction between grains of sand cause a curious "singing" sound.

The world's largest piece of copyrighted artwork.

The once-abandoned 140-year-old hotel used in the movie "In Dreams."

Once the largest gravity dam in the world.

The hill that gave the Massachusett tribe, and later the state, its name.

This supermarket is suspended 25 feet above an interstate highway.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

A tiny village church in dramatic surroundings.

The last remaining 19th-century tenement from Boston's old West End neighborhood.

A memorial dedicated to victims of the Irish Potato Famine who perished while quarantined on this island.

One of the now-less-hidden floral gems of the "Emerald Necklace."

Second largest wastewater treatment plant in the country.

A magnificent waterfall nestled in the heart of the El Yunque National Forest.

A three-piece musical sculpture installed between the subway tracks at Kendall Station near MIT.

On a former island, this old fortification once used to protect the Boston Area and started Edgar Allan Poe in his military career.

Situated in a bustling intersection, this "mobile" monument that honors local veterans from five different wars has moved several times but appears to have found its final resting place.

A war memorial that appears to ascend from its forested setting.

More than 200 unconventional musical instruments that anyone can play.

The mansion home of author Edith Wharton.

A men’s restroom became a sandwich shop.