Giant selenite (gypsum) crystals at the 2018 Tucson Gem and Mineral Show

Tucson Gem and Mineral Showgypsumselenitecrystalsmineralrock

Tourmaline pebbles at the 2018 Tucson Gem and Mineral Show. 3 photo panorama

Tucson Gem and Mineral Showtourmalinepebblesmineral

Cars going through Gates Pass outside of Tucson, AZ at sunset. 2 photo panorama

Gates PassTucsonArizonasunsetrockcactuscactisaguaroroadcarlight trailsnightlong exposure

Stars partially obscured by high-level clouds at Gates Pass outside of Tucson, AZ. From bottom left to top right: Sirius (part of Canis Major), Orion, Taurus, and the Pleiades cluster

starsskynightlong exposurecloudsSiriusCanis MajorOrionTaurusPleiades clusterTucsonArizonaGates Pass

Stars partially obscured by high-level clouds at Gates Pass outside of Tucson, AZ. From left to right: Orion, Taurus, and the Pleiades cluster

starsskynightlong exposurecloudsOrionTaurusPleiades clusterTucsonArizonaGates Pass

Saguaro cacti outside of Vail, AZ. 6 photo panorama

cactuscactitreesplantsbrushsaguarodesertArizona

Saguaro cacti outside of Colossal Cave near Vail, AZ. 35 photo panorama

cactuscactitreesplantsbrushsaguarodesertArizonaColossal Cave

Large limestone cave formations in Colossal Cave, Arizona. 5 photo panorama

ArizonaColossal Cavelimestonecavecave formations