Watch what happens when rocks fall at Cliff Palace. This is from August, when we closed down tours to spall off loose rocks above Cliff Palace. All of these sandstone alcoves are unstable, and small pieces often fall. When bigger rocks threaten, we try to knock them loose. Sometimes, the threatening rocks are so large that we have to close down whole alcoves. That's why Spruce Tree House is closed this year. (sdb) | Mesa Verde National Park

14K views · 259 reactions | Looking for things to do in Durango Rivertrippers & Adventure Tours video will inspire you to see and do it all! Check out the Durango & Silverton Narrow Gauge Railroad, Mesa Verde National Park, the Animas River, the San Juan National Forest and La Plata Mountains | Visit Durango | Facebook