This is my cat, Andy, looking into our 65 gallon tank. It is a deep tank, on a large stand, and actually the top of it is probably about 4 1/2 feet off the ground. Neither of my cats has ever jumped up on it (it has a glass top) but there is nothing close by for them to use as "steps." Mostly they just like to look at the action inside. Actually when no one is home we usually keep the door closed just so they aren't tempted to get into trouble.