Inspiring Herman Melville and Henry David Thoreau, Mount Greylock in western Massachusetts is the highest point in the state at 3,491 feet above sea level.

A careful eye can find hundreds of dinosaur tracks running along the Connecticut River.

This sprawling 18th-century cemetery features unique and beautiful gravestones, including one shaped like a tree.

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

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

More than 200 unconventional musical instruments that anyone can play.

Erotic art covers the walls of the largest ancient pleasure palace.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

This Roman amphitheatre was also the location of the first gladiator school.

Ancient snack bar of the Roman Empire re-opened.

The walls and streets of the ancient city are peppered with penises.

Before it was buried by volcanic ash, this fast-food restaurant fed the hungry hordes of ancient Rome.

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

This roadside wonder is as mysterious as it is beloved.

A former copper mine which became a truly unsuccessful prison.

A journey through a curious collection of oddities and wonder.

The ancient past meets the retro-future at these dinosaur tracks that are protected by a geodesic dome.

While many places make the claim, the Library of Congress says this restaurant is the birthplace of the hamburger.

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

Who knew the Devil's domain was a hot spot for tubing?

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

The first statue to be added to Saint Peter's Square in over 350 years is an ode to migrants and refugees around the world.