This little-known rival to the Library of Congress houses one of the largest collections of pre-1876 American books, newspapers, and manuscripts.

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

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

When the Austin Dam failed it destroyed much of Austin...and then it failed again.

Where America's first doomsday cult awaited the end of the world.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

An abandoned stretch of highway, deteriorating next to the operational one.

A virtually untouched "home on the hill" for the flora and fauna of Rhode Island.

Panoramic views of the city of New Haven and the Long Island Sound, with a side of history.

This Connecticut chapel is a starkly modern, and surprisingly colorful, architectural rebel.

Underground tunnels remain beneath this abandoned mental asylum.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.

A wunderkammer hidden on the top floor of the Hartford statehouse.

The intriguing personal collection of a professional demon-chaser.

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.

The summer home and later final residence of acclaimed American sculptor Augustus Saint-Gaudens.

A museum dedicated to "science, history and the arts" little changed since 1915.

A very big rock just plopped down in the New England woods.

Former abode of notable poet, complete with literary references and stories of ghosts.

Birthplace of America's first documented serial killer.

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

These towering spires and glowing walls are carefully crafted from hundreds of thousands of icicles.