Once the future of underwater combat, this old sub is now open for visitors to muck around in.

A century after his death, this covered bridge still calls to mind the plein air painter who loved it.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

A collection of birdhouses await curious motorists and avian squatters.

Its unique collection details the history of the state's svelte railroads.

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

True to its name, this bouncy walkway may be the world’s smallest suspension bridge.

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

An unusually designed bridge from the 1920s was built to withstand the tides and winds of Maine.

This Maine bridge may be the last wire-supported bridge of its type in the world.

This cavernous abandoned marble mine is popular with ice skaters in the winter.

This railroad tunnel was once the longest in Massachusetts.

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.

On top of Gibbet Hill lie the ruins of a lavish turn-of-the-century estate that never quite came to be.

A tribute to the couples who brave long periods of separation during wartime.

Beautiful hillside Vermont cemetery with amazing funerary art.

This large cemetery is known as the museum of granite sculptures.

Even Henry David Thoreau found this glacial pothole irresistible.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

The debris forms a solemn memorial to those who died in a 1963 accident.

One New Hampshire alleyway has become home to a public gallery of feline art.

This riverfront statue honors the inventor of the first video games ever sold.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

This narrow canyon has been carved by the river over thousands of years into spectacular and curious forms.