Реферат: Modern graffiti (within the last 50 years) has caused significant, adverse impact to archeological sites in caves. Access, nearby population centers, stable and easily available lighting, and spray paint have provided the tools to allow large scale vandalizing of many caves. Graffiti removal in caves can be achieved on a large scale to repair/restore the cave to its natural condition.
NSS cavers have developed a methodology where up to three in-cave teams can work independently addressing graffiti tags in their areas. The primary graffiti removal tool is sandblasting. Since 2001, nine caves in six states have been completely or partially cleaned of graffiti. Latest of the restorations have been Sandia Cave, New Mexico. Sandia Cave is a National Natural Landmark primarily for archeological discoveries made in the late 1930s. The cave is a single, 139 m, phreatic, horizontal passage which has received significant visitation and graffiti over the last several decades