Known as the “Long Lines Building,” 33 Thomas Street is a 29-story, windowless skyscraper in Lower Manhattan built in 1974 for AT&T. Designed to withstand a nuclear attack, the brutalist tower functions as a self-sufficient fortress, complete with its own power and water supply, making it one of New York’s most unsettling structures. A 2016 Snowden-linked investigation revealed alleged NSA surveillance operations under the codename TITANPOINTE, deepening its mystery. Locals and night workers have reported strange hums, odd lights, and a persistent sense of being watched, reinforcing its reputation as both a spy hub and urban legend.