The railroad tunnel nicknamed the "Bloody Pit" for taking the lives of hundreds during its construction.

Civil War Fort on an island in the Boston Harbor.

Civil War-era Fort designed to withstand invasion and attack, with tricky traps called "murder holes."

This tidal island, a sacred site in early English Christianity, was the target of a notable Viking invasion.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

This site commemorates the former inn and restaurant where the chocolate chip cookie was first crafted.

This former theme park in New York's Adirondack Mountains fell into ruin before being resurrected as a state-run campground

The highest peak in Wales is said to be the final resting place of a giant killed by King Arthur.

Stroll through Welsh history in a village of reconstructed structures.

This charming woodland trail is peppered with poetry.

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

From economic backbone of a community to deadly diving hole, these former stone quarries are now a park for rock climbers and graffiti artists.

The ruins of one of the first railroads in the U.S. lie hidden within a neighborhood cul-de-sac.

The homestead of American patriot John Adams.

Journey through various trails to discover a land before time along the Chazy Fossil Reef.

The first American department store, and home to the largest operating musical instrument in the world.

Everyone's favorite neighbor is remembered fondly in this small-town church.

Step back in time while shopping inside this local store.

More than 50,000 gannets claim the cliffs of Bonaventure Island.

A charming museum of natural history featuring dioramas and exhibits made entirely by college students.

These light, hollow rolls have been linked to Acadia National Park since the 1890s.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

This "common-as-dirt" museum celebrates the glory of normalcy.