El Valle de la Luna features an almost extra-terrestrial landscape caused by erosion. There are two circuits through the park, one that takes about 15 minutes, and a longer one that takes about 45 minutes. Both are easy hikes, but hang on tight to the little ones - there are some steep drops protected by questionable guard rails. There is a nominal entrance fee, about USD $2 for foreign adults. Park signs are in Spanish and English (English translation courtesy of Google).