No longer simple four-sided structures, today you'll find many different types of climbing walls that have been designed to meet the ever-growing demands of those who want more. If you've done any looking you know that many of today's rock climbing walls are ergonomically-designed durable structures that are made from top quality materials and that actually look like real rock landscapes. The more common types of climbing walls include extreme bouldering walls and panel wall systems and towers. Each of these can be designed for indoor or outdoor use. Most can be designed as stationary systems or mobile units. For an experience that's as close to reality as possible, extreme bouldering walls are made without holds. Climbers rely on real rock-like features such as cracks and crevices to chart their courses. Panel systems can include flat or semi-circular panels and overhangs. Because they're modular, the pieces can be assembled to accommodate any size space. And of course, if you're not satisfied with these basic types of climbing walls, there are companies that will custom-design a rock climbing system that will suit you every need. Climbing and rappelling are the most common climbing wall activities. Young or old, those who participate in rock climbing activities are sure to get a thorough physical and mental workout. Participants build muscle mass and endurance and burn calories, too! It's a challenging activity and one that builds self-confidence, and teaches participants how to focus and develop patience. Rock climbing is physically and mentally demanding, but it's also a lot of fun. It must be, otherwise it would not be one of the fastest growing sporting activities. As more and more people become involved with this exhilarating activity, you can expect that more types of climbing walls with even more realistic features will be created