Hill-like structures formed by glaciers and sandy spits of land.

Solar powered Spectacle Island features all-green facilities.

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

Ice cream stand, snack bar, and time capsule of milk conveyance.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

This is the house that spite built.

A steampunk wonderland that preserves America's history of industrial innovation.

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

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

Since 1973, this block has been home to the most concentrated collection of murals in San Francisco.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

This shop specializes in oddities and Victorian-inspired wonders.

A winding path built in secret on the edge of the continent.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

There must be a pun in this haystack somewhere...

This New York holdover was built to provide housing for shopgirls and still does not allow men above the lobby.

The former hotel where Tesla invented the radio.

Elevated freight railway turned wildly successful urban park.

The humble home where the famous beat author lived briefly and wrote one of his most famous works.

The world's largest piece of copyrighted artwork.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

This impressive Boston holy house is the American mecca for Christian scientists.