Hello Linda,
Yep, looks like the seal has failed on your 1/2 circle top window, as well as the grids having collapsed. Easiest and most cost effective way for you handle this is to find a glass repla ... read more
You should decide if you want above ground or in-ground. If you decide to go with in-ground, you should do some research on vinyl liner compared with concrete. :-) Good Luck!