Pine Barrens, New Jersey
Ong’s Hat is a tiny ghost town that only ever held a single building called Ong’s Hut. Reportedly, the town was lively in the 1860s, but it plays a role in one of the earliest internet-based conspiracy theories. The conspiracy alleges that Princeton professors supposedly built a secret quantum physics lab in the tiny town, and that they participated in inter-dimensional travel. Bizarre as the theory is, it would explain why the town is deserted today.