A playground inspired by differential calculus dangles from the ceiling of the Liberty Science Center.

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

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

This disastrous New Jersey safari park saw animal attacks, escapes, and disease before being abandoned.

The remains of a century-old mansion that met a fiery demise years after it was deserted.

This massive boulder is either a unique rock formation created by glacial melt or a magic energy vortex.