Vandals left a half-dozen graffiti tags on walls at the Juan Tabo picnic site in the Sandia Mountains, and volunteers cleaned them up. ALBUQUERQUE, N.M. – Vandals left a half-dozen graffiti tags on walls at the Juan Tabo picnic site in the Sandia Mountains, and volunteers cleaned them up. Volunteers with Friends of the Sandia Mountains said vandals left a half-dozen graffiti tags on the interior walls. The group worked all morning with special tools to clean up the graffiti.