After being destroyed by IRA sympathizers, the ruins of this stately Irish manor have sat vacant for decades.

The mysterious headstone of an unidentified bank robber was seen visited, every year, by a woman in black.

This museum holds a fully-functional replica of the "Turtle," the first American submarine ever built.

This opera house along the banks of the Connecticut River has two Tony Awards to its credit but it’s never staged a single opera.

This classic steam-powered train takes tourists on a nostalgic trip around the Connecticut River Valley.

The Connecticut village named for its subterranean thunder.

British troops and Prohibition couldn’t stop this spot from becoming one of the United States' oldest continuously-run taverns.

House used in the 1971 horror film "Let's Scare Jessica to Death."

This picturesque Victorian ghost town was once a thriving mill community.

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

With some 500,000 books across five buildings, this bookstore is a reader's paradise.

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

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

This modern castle sat empty for decades before a fire inspired its builders to complete its luxury halls.

Over a dozen Native American earth mounds dating back over 2,000 years dot this Tennessee archaeological park.

William Faulkner kept his beloved estate wild and untamed.

The scant remains of an expansive indigenous civilization can be seen at this Arkansas state park.

Walk through row upon row of manicured miniature trees at the United States' largest bonsai nursery.

This park offers a variety of sights and activities including trail rides and buffalo sightings.

This head-spinningly bizarre Depression-era art cave is wall-to-wall quartz and Jesus.

Walk the whole Mississippi River!

The juke joint where legendary soul artists ate, drank, and made merry.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.