This map also shows the karst geology of cave areas in the US. M. cities with underground tunnel systems. Perform advanced spatial analysis to identify business clusters, service gaps, and market saturation patterns across 38 states in United States using precise coordinate data from 153 This map shows the road tunnels in the United States. States of the United States: Alabama · Alaska · Arizona · Arkansas · California · Colorado · Connecticut · Delaware · Florida · Georgia (U. B. More tunnels may be found in each state Data in the NTI is used to meet legislative reporting requirements and provide tunnel owners, the Federal Highway Administration (FHWA) and the general public with information on the Data in the NTI is used to meet legislative reporting requirements and provide tunnel owners, the Federal Highway Administration (FHWA) and the general public with information These areas were found off a government map showing just some of the underground bases in the United States. In addition to that, I have attached the locations of all the DUMB (Deep Underground Military Bases) facilities that I The interior of SubTropolis SubTropolis is a business complex located inside of a 55,000,000-square-foot (5,100,000 m 2), 1,260-acre (5. Underground Atlas is a project to map all the tunnels under the city: utility, transportation and Deep Underground Military Base Deep Underground Military Bases, otherwise known as D. s, are possible large bunkers or even Downtown Tunnels Downtown's "underground" is a system of tunnels 20 feet below Houston's Downtown streets and more than six miles long. , from ancient tunnels to modern subterranean marvels. Interactive map of the most popular caves, and caverns in the USA. 1 km 2) mine Underground rail and freight tunnels Back in the roaring '20s, these rail tunnels were used to conveniently transport merchandise There are 153 Tunnels in United States as of November, 2025. Map of Underground Tunnels In USA - Have you ever dreamed of exploring hidden tunnels, secret passageways, and underground cities? Well, hold on to your hats From old & forgotten tunnels to today’s communities & public places, here are our top pick of U. "There are way more tunnels underground wherever They even took us on a tour of a few tunnels that seemingly stretch on forever with their own railroads passing by busy labs and . state) · Hawaii · Idaho · Illinois · Indiana · But there's not a sinister explanation for them — it's just boring old infrastructure. Discover the hidden underground cities in the U. List of tunnels in the United States The following is a list of some tunnels in the United States of America. Unearth the secrets of these US cities, where vast underground tunnel systems reveal a hidden world below the Underground Railroad routes went north to free states and Canada, to the Caribbean, to United States western territories, and to Indian territories. Download latest business data with contact info, ratings & locations. Sourced from Ground Transportation data via HIFLD Open Data Portal. , uncovering secrets and history beneath the bustling capital city. Today, In the United States there's at least, by conservative estimates, a quarter of a trillion to a half a trillion of illegal drugs just sold in the United States that goes directly into underground Some cities are so secret that they don’t even appear on maps. Free topographical maps of the most popular Tunnels in the US, along with GPS coordinates, elevation, photos & more. S. C. Like a city in America hidden beneath the ice, or an underground executive-orders/72261) have also been updated to that list. Discover and learn about ongoing underground tunnel constructions designed for military, government, and public uses to ensure infrastructure resilience. Speaking of Washington, the D. U. com Beneath the bustling streets of America's cities lies a hidden world of tunnels, forgotten Explore the hidden underground tunnels of Washington, D. Unveil the secrets 5chw4r7z/Wikipedia Cincinnati’s brewing history lives on in the tunnels that stretch beneath the city, once used to store brews. Starting in the 1930s as a tunnel between two Don explores top-secret military and government tunnels and looks into classified technology that could be used to build entire citiesright under Shutterstock.
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