Tag Archives: caves

Map Monday Bonus: Saint Paul’s Sand Rock Tunnel Sewers

Via Dana DeMaster and Than Tibbets’ Twitter conversation, here is a map of a mysterious and unknown subterranean engineering feature in Saint Paul, Minnesota’s weirdest city in some ways. Here is your map. The “sand rock tunnels” are in yellow.   [.pdf is here.] The initial query came from yet another West 7th Street rumor: […]