While charting the Mississippi River for the US Army on the site of present-day St. Paul, Major Stephen H. Long comes across a cavern known to local Dakota people as Inyan Tipi (settler-colonists came to call it Fountain Cave). The cave, located a few blocks west of present-day Randolph Avenue near Shepard Road, had many curious rooms and a cold crystal spring. Lewis Cass and Henry Rowe Schoolcraft visit the cave on August 2, 1820, and Schoolcraft, noting the number of names written on the walls, comments that the cave is a popular site for tourists. Later, Pig's Eye Parrant operates a saloon inside the cave. In 1955 the cave would be filled in during construction of the Archer-Daniels-Midland elevator and Shepard Road.