For a railroad track that hasn’t been used in years, Track 61 sure has a lot of important fans. The roughly 1.5-mile spur cuts across the Seaport District from the southwestern edge of South Boston.

There are secrets under our feet, above our heads, and around every corner in New York City, many you may be passing by without even knowing it. Some of these special nooks are easier to access than ...

Beneath Midtown Manhattan lies a two-level rail yard stretching from 42nd to nearly 50th Street. More than 60 tracks operate in controlled darkness. Among them is Track 61 — a service spur converted ...