The Peñon de Ifach is a large rock, located between the Calpe beaches. As you walk up the slope, before you begin the walk to the top of the Peñon, you have a chance to visit a museum documenting the natural parc. The walk is quite pleasant, with excellent views on Calpe and the mountains in the background - until a tunnel excavated in the rock. There is a rope to help you in the tunnel - the rock is slippery and it's easy to fall and get hurt. The problem starts after the tunnel where the walk continues on the same slick rock as in the tunnel but, inexplicably, there is no rope to help you and, worse of all, there is a sheer drop to your left. After that exposed passage, the rest of the walk is easy and the views worth the effort. For the adventurous, the Peñon has some sheer walls which attract lots of climbers. If you don't feel like walking up the Peñon or climbing it, you can walk at the bottom, along a nicely arranged walk - start near the marina, on the right hand side of the Peñon. Bird watchers will enjoy the birds nesting and swirling all around the rock. To protect the birds, walking and climbing up the Peñon is not allowed during the nesting season.