Ask AI: What is the longest known underground tunnel in the United States and where does it start and and that and show me geographically on a map

I'm an AI text-based assistant and currently don't have the capability to show maps. However, I can tell you that the longest underground tunnel in the United States is the Delaware Aqueduct. The Delaware Aqueduct, with a length of approximately 85 miles (137 km), is the longest tunnel in the world. It's part of the New York City water supply system. It carries water from the Rondout Reservoir through the Chelsea Pump Station, under the Hudson River, and to the Kensico Reservoir, located in Westchester County. To visualize this geographically, you may want to use a digital mapping service such as Google Maps or a dedicated geographic information system. You might need to type "Rondout Reservoir" and "Kensico Reservoir" into the search bar to find the two endpoints of the tunnel.