The headquarters of the Audubon Naturalist Society is a small slice of heaven for nature lovers.

A tribute to the beloved, kind-hearted "homeless mayor" of Silver Spring.

A total of 14 men held the title of "president" before George Washington—their historical legacies are enshrined in the lobby of a hotel.

A swimming hole in the historic industrial quarry that supplied the marble for the Baltimore Washington Monument.

Remnants of a storybook amusement park hidden behind a strip mall.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

Fascinating museum dedicated to the under-appreciated medical history of urology features some wince-inducing devices.

An eerie, abandoned military base engulfed by nature and graffiti is now home to a local park.

This abandoned sea fort has become an accidental bird sanctuary.

Once a thriving business district, this former shopping area is now an urban ghost town in the heart of the city.

A blank headstone topped with a pile of pennies marks the final resting place of the infamous assassin.

The man who first patented the Ouija board rests in peace beneath a headstone that playfully reflects that achievement.

A small museum packed with specimens from important fossil sites and minerals from historical pegmatite quarries.

A reliquary of pop culture marvels, including the world's largest (and most terrifying) Jack-in-the-Box.

An abandoned gun-funded 19th century utopia.

A portrait of the Charter Oak hangs in a frame made from the Charter Oak.

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

Memorial to one of the most fatal fires in both circus and U.S. history.

This lovely hilltop tower was specifically built to withstand 100 MPH winds.

The early American colonists were such ferocious drinkers the law actually required every town to have a tavern.

An abandoned Victorian-era mill in the middle of modern Manchester.

This sculpture commemorates the first instance of an American president pardoning a turkey.

A parade of antique steeds offers a quirky ride through history.