Kilauea; Mount Etna; Mount Yasur; Mount Nyiragongo and Nyamuragira; Piton de la Fournaise; Erta Ale
After driving about kilometers ( mi) since it left Victoria crater, Opportunity first saw the rim of Endeavour crater on March 7, 2009.   It passed the 16 km ( mi) mark along the way on sol 1897.  Meanwhile, at Gusev crater, Spirit was dug in deep into the Martian sand, much as Opportunity was at Purgatory Dune in 2005. 
"The scientific allure is the chance to examine and investigate the compositions and textures of exposed materials in the crater's depths for clues about ancient, wet environments," NASA stated in a press release. "As the rover travels farther down the slope, it will be able to examine increasingly older rocks in the exposed walls of the crater."