New York City is currently grappling with a string of mysterious sewer entries that began in early May, as groups of individuals have been captured on film climbing into the city’s underground infrastructure. While the New York Police Department has stated there is no current threat to public safety, its intelligence division is actively investigating these nocturnal excursions.
Did You Know? The city’s sewer system is vast and complex, consisting of 7,400 miles of pipes that are accessible through 5,000 manholes.
Why these underground excursions have captured public attention
The trend began on May 5 at 2:00 a.m. when three individuals wearing hip waders and carrying flashlights pried open a manhole in Queens. This initial event drew public notice after witness Aki Jakupovic described the scene to NBC New York, noting that the group closed the cover behind them as if they had never been there. Jakupovic compared the sight to the fictional Teenage Mutant Ninja Turtles, a reference that has persisted as local media outlets continue to track the sightings.

The intrigue deepened on May 28, when additional groups were filmed entering manholes in both south and north Brooklyn. These events have sparked intense speculation regarding the explorers’ motives. While some reports suggest they may be scavenging for valuables, this is not the first time the sewers have drawn such interest. In 2015, a trainee at the New York Department of Environmental Protection was arrested in the sewers, and another incident last year involved three men allegedly searching for gold. Historical records show this is a long-standing fascination; as far back as 1936, the New York Times reported that police recovered $3,500 from a Manhattan sewer.
The risks and potential consequences
Despite the curiosity surrounding these “mole people,” city officials emphasize that the practice is both illegal and dangerous. Rob Wolejsza, a spokesperson for the New York Department of Environmental Protection, warned that the sewer system contains numerous hazards, including unstable surfaces, flooding risks, and potentially deadly gases. Wolejsza confirmed that the department has inspected all locations where entries were reported and maintains that the city’s infrastructure remains safe.
Expert Insight: The persistent allure of subterranean spaces, as documented in sociological research like the 2024 book Life Underground by Terry Williams, suggests that these events are part of a broader, long-term human pattern of seeking out hidden city layers. While the current sewer visits in New York may be brief, the presence of similar underground populations in other cities—such as the hundreds of people living in storm drains beneath Las Vegas—highlights that tunnels remain a complex, high-risk space for both trespassers and city authorities.
What happens next?
As the intelligence division of the New York Police Department continues its investigation, it is likely that authorities will increase monitoring of manhole access points to deter further unauthorized entries. Given the ongoing public interest and the potential for more footage to emerge, the city may see a continued focus on securing critical infrastructure. If further groups are identified, they could face legal consequences similar to those seen in past arrests involving unauthorized sewer access.
Frequently Asked Questions
Are the sewer explorers a threat to public safety?
The New York Police Department has stated that there is no threat to public safety at this time, though the department is investigating the incidents.
Why are people entering the sewers?
While the specific motives of the recent groups are not confirmed, local news outlets have theorized that individuals may be scavenging for valuables, a practice with historical precedent in New York City.
Is it dangerous to enter the sewer system?
Yes. According to the New York Department of Environmental Protection, the sewer system contains noxious gases, flooding risks, unstable surfaces, and confined spaces, making entry both illegal and extremely dangerous.
Will the city see more of these underground explorations as the summer season continues?
