If you love architecture and find yourself in the Phoenix area in the future, you need to take a tour of Taliesin West. Even for myself, who is not that knowledgeable in architecture, I found the tour extremely fun! Taliesin West in Scottsdale was the winter home of Frank Lloyd Wright, but the property also doubles as his architecture school. You can't explore the property on your own, as Taliesin West is still functioning as an architecture school, but the $32 tour ticket is well worth it to not only see Taliesin West but also hear the stories behind the building and the various aspects of it.
During the 90-minute tour, you'll hear about this petroglyph and how the carvings inspired Wright's iconic Whirling Arrow, which actually symbolizes "fellowship".