Did you know the world’s deepest known glacial pothole is in Minnesota? The 60-foot deep “Bottomless Pit Pothole” was formed ten thousand years ago when melting glaciers carved the St. Croix River Valley. Within that ancient river were fast-moving whirlpools of swirling sand and loose rocks that wore deep holes into the basalt riverbed. You can visit more than 200 potholes varying in size at Interstate State Park in Taylors Falls, MN. In addition to the potholes, you’ll also find beautiful overlooks at the park that are great in the fall. #minnesota #stcroixrivervalley #taylorsfalls #onlyinmn #exploremn