- Juried Group Show: “2018 Transformations” at the Pennsylvania Center For Photography in Doylestown. One entry displayed from November 2 to 18. Juror: Justin Mulder. Piece: Hall of Horrors. Joshua Tree National park is not only known by its beautiful trees but also by it’s very interesting rock formations. The Hall of Horrors is a popular place for hikers and climbers but it deserves to be added to the list for spectacular dark skies locations.