Tonight, you travel to a 200-square-mile patch of southeastern Massachusetts — less than an hour south of Boston, surrounded by strip malls and suburbs — where five centuries of documented reports have produced one of the densest concentrations of unexplained phenomena in North America.

At the center sits the Hockomock Swamp — 17,000 acres of impenetrable freshwater wetland that the Wampanoag named “the place where spirits dwell” centuries before any European arrived. Glowing spheres have been reported hovering over the swamp since the colonial period. In 1760, a sphere of fire was documented above the wetland. In 1908, two undertakers watched a light move against the wind over the treeline. In the 1970s and 1980s, on-duty police officers filed official reports of luminous objects in the sky above the triangle.

You trace the creature sightings — large, dark, seven-foot bipedal figures reported at the swamp’s edges since the 1970s, giant birds with wingspans far exceeding any species native to Massachusetts, and snakes described as fifteen feet long in a state where nothing grows past six. You walk through the Freetown-Fall River State Forest, where police investigated ritualistic animal killings and where human remains have been found in cases that generated national attention. You stand on the ground where King Philip’s War was fought in 1675 — the deadliest conflict in American history relative to population — on land that the Wampanoag defended and the English colonists took by force.

You sit with the skeptic’s strongest argument: that the triangle was created, not discovered — that a cryptozoologist drew three lines on a map in the 1970s and gave a name to what had been shapeless, and that the name itself generated the reports that followed. And then you sit with the fact that the Wampanoag named the swamp five hundred years before anyone drew a triangle around it.

The suburbs are five minutes behind you. The swamp is dark ahead. Over 300,000 people live inside the triangle and most have never thought of themselves as living somewhere strange.