An approximately 500 million-year-old rock outcropping covered in fossilized bacteria.

Nassau Hall has served as army barracks, a museum, and played a key role in the American Revolution.

Infamous marsh filled with toxic waste, World War II-era London rubble, and dead mobsters galore.

On the Hudson resides one of the largest clocks in the world.

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

An allegedly cursed tree represents a town's reckoning with a racist past.

New Jersey's last historic covered bridge was rebuilt from pieces of the original 19th-century structure.

These unassuming lighthouses have seen the first reading of the Pledge of Allegiance, the first wireless transmission, and more than one mystery.

Vacant Beaux-Arts buildings that serve as reminders of a beach town’s glory days.

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

These mystical miniature houses bring a touch of magic to the New Jersey woods.

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

Home to a protest movement, a bombing, and a dramatic change in labor history.

This memorial plaque remembers a strangely shallow maritime disaster known as "Chicago's Titanic."

No one knows how many bodies are in this vault in a Chicago public park.

A strange and haunting monument of unknown origin in the historic Graceland Cemetery.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

This alley in downtown Chicago held the bodies of over 600 people after the fateful Iroquois Theatre fire.

A shining sculpture made of 3,115 lights, the number of visible stars in the Northern Hemisphere.

A gothic church spire sits atop this skyscraper, the tallest church in the world.

A haunting statue called "Eternal Silence" has quite the reputation among visitors with active imaginations.

An enormous park-like oasis, full of famous Chicagoans’ graves.

A giant bronze coil of feces is both a tribute to doggie defecation and a reminder to pick it up.

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.