Hole in the Rock is a naturally formed geographical structure that features large stones with holes forming in them. The rock formation is located in Papago Park which is a municipal park of both Phoenix and Tempe, Arizona. The rock formation includes a series of openings that eroded in the sandstone. Scientists speculate that the formation was created approximately six to fifteen million years ago. The area itself looks like petrified mud cakes and because of the unique structure draws visitors from all over the country to witness the uniqueness. The formation is a popular draw and attraction to the Papago Park. The formation can be climbed but is discouraged because of the danger for the inexperienced. The openings and the main chamber of the formation, near the top of the rock or summit, is easily accessible because the structure is very smooth. The chamber provides excellent views of the city and great photo opportunities. The wind blows constantly in this area so it is recommended that proper attire be worn if spending any time at the formation. Due to the wind continually blowing the sand against the structure, new formations are constantly in the works but it could take another million years before any changes are visibly noticed.