Two caves sit at different levels on this 52-in tower and they are not the same: the lower one runs 19-in long with a door at each end, while the 9.5-in cube above has a single opening for a cat that prefers one way in and out. A ladder at the base lets a kitten or a short-legged adult start climbing on day one instead of waiting to grow into the first jump. Above the caves, a 12-in padded top perch and two round perches stack up the rest of the height. Sisal covers the posts, and each layer carries 22 lbs on a 19 by 19-in base.