SALT LAKE CITY (AP) — Utah state parks officials are preparing for a rare tour of a cave in the west desert that contains evidence of human habitation more than 11,000 years old.

Authorities say that Danger Cave is one of the most important archaeological sites in the country. Well-known University of Utah archaeologist Jesse Jennings used was one of the first to use radon carbon dating when he excavated the cave in the late 1940s, and he confirmed that humans had been in the area much longer than previously thought.

It was named Danger Cave when a large rock fell off a cliff face, narrowly missing an excavation crew. Tickets went on sale this week for a tour scheduled for Nov. 14. Space is limited. The cave is located near Wendover, about 120 miles west of Salt Lake City.