There is an indoor arena and a indoor arena. It involves the use of both show jumping-type obstacles and cross country-type obstacles (including banks, water, logs, and brush fences) in a course of an indoor arena. The out door arena is suited for all ages and levels. You can adjust all the obstacles to suit you and your horse. The indoor arena is a mixture of soil and sand. Where as the out door one is all natural with water jumps and a wide range of obstacles.