Devious political maneuvering and four ancient, working telescopes are central to the world's second-oldest observatory.

Tucked away in the Leiden city hall are a group of works by famed artist MC Escher.

A 'living museum' in Leiden, the oldest of its kind in the Netherlands.

If it feels like a speakeasy, that’s because it probably was one.

These 20-foot sculptures will help guide you from the local train station to the local sculpture garden.

The first dish to bounce radio signals off the Moon, it was the forerunner to the U.S. Space Program.

This old-fashioned candy shop, ice cream parlor, and diner served as the setting for one of TV's most controversial series finales.

Where the embers of the Big Bang were first detected.

A giant light 13 feet high shines near Thomas Edison's old Menlo Park lab.

A completely round house designed for the Atomic Age.

Tucked behind New Jersey's abandoned Gingerbread Castle lie the eerie ruins of a once-flourishing paper mill.

A world-class collection of mechanical musical instruments and automata.

World War II bunker still standing on the New Jersey beach.

The creek where a shark wreaked terror upon New Jersey, and served as the inspiration for "Jaws."

This Great Depression-era creation was once known as the strangest house in the world.

One of the world's largest model railroads is a mind-boggling achievement.

Along the Palisades skyline are the ruins of a large mansion built in 1911 and demolished in the 1930s.

Whimsical artist house in the New Jersey woods.

Once in a state of dilapidation, this candy-inspired fortress is now being revived.

A unique sculpture park that specializes in the huge and bizarre.

Hundreds of glow-in-the-dark objects light up a museum in a historic zinc mine.

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.