Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

This one has sailed five times as far as Sir Francis Drake's famous ship.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

A bizarre roadside attraction and the first instance of miniature golf in the world.

A battle between nature and architecture in the Cambodian jungle.

The "lovely red Vega" of the legendary record-settling pilot.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

A fitting attraction for the corn capital of the world.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Resting place of Hollywood's immortals is also site of summer film screenings.

The most visited, and possibly most controversial, museum in Germany.

The most confusing clock in New York.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

Medicinal spa created with the discharge from a geothermal energy plant.

The world's longest known cave system.

The only structure left with direct ties to the Salem witchcraft trials of 1692.