📜 Result of a massive underground nuclear test in 1962. 🔍 Largest man-made crater in the U.S., listed on the National Register of Historic Places. # Why Go 🚶 Monthly public tours available 🌿 Observe returning plant life 📖 Learn about nuclear testing history 🏛️ Visit a U.S. National Register of Historic Places site # Why Avoid ⚠️ Public access restricted, requires a tour 🚫 No unauthorized driving or photography of military sites # Tips 📞 Contact DOE/NNSA Field Office in Las Vegas for tour info 📍 Tours originate from Atomic Testing Museum near UNLV ⚠️ Foreign nationals must follow instructions carefully # Cost 💰 Free monthly tours. # Hours 🕒 Monthly tours, check with DOE/NNSA for schedule.