The mounds at this site were reconstructed with the help of archaeologists and historians.

The final resting place of the hero of Air Florida Flight 90 known as "the man in the water."

The oldest continuously-operated inn in the United States, once owned by Henry Ford.

This 16-foot, intricately detailed model of the Gearing-class destroyer has been called the most detailed model ship ever built.

Though it's thrived abroad, this forgotten Dunkin' rival has just one store left in the States.

One of Canada's oldest collections of stone fur trading buildings.

In the power of this waterfall, Alexander Hamilton saw the potential for industry.

Now in ruins, this castle stood for centuries and saw a number of gruesome events.

This tower was once used to create ammunition for early settlers.

Rusted and decayed, this former mining site is a portal to the past.

This 20th-century replica of a 13th-century castle has itself fallen into ruin.

This unique house, the only one of its kind in Brooklyn, was built as part of a real estate developer's showcase.

This Gold Rush ghost town was once the subject of a territorial dispute between California and Nevada.

The ruins of a military outpost from the 1860s form the centerpiece of a Nevada state park.

The father of Belfast medicine is buried in the graveyard of this 13th-century church, which now lies in ruins.

Though the case is scorched and the buttons half-melted, this hardy handheld gaming device can still run a game of Tetris.

This concrete monster of a wreck lies in the mouth of Langstone Harbour as a monument to the incredible history of D-Day.

Now in ruins, this abbey was the home of Tironensian monks for more than 400 years.

In the middle of a New England forest sit the crumbling ruins of World War II-era ammunition storage bunkers.

A 13th-century stronghold that has fallen into ruin.

A 2017 crowdfunding campaign saved this historic castle from being destroyed.

The only gallery in New York dedicated to olfactory art and the exploration of scent in art.

A series of fish plaques that are embedded in the malls of Ocean Parkway.

The hallowed remains of a 900-year old Ancestral Pueblo great house.