Ptačí kupy (1013 m above sea level) are an interesting grouping of several rocky peaks. The wide view from there especially includes the Frýdlant area and the western section of the Jizera Mountains with the unmissable body of water of the reservoir on the Black Nisa framed in behind by the long Ještěd Ridge. There is a nature reserve of the same name in the northwest. You may notice a lot of wind-felled trees and the original forest which has been devastated by emissions on the peak and in its environs.