Depends on what you like in a dive. I dive the lakes just to keep in practice & for scavenger hunting. Usually come up with anchor, fishing pole, or something interesting. That said Blue Hole is a swimming spot on the San Gabriel river in downtown Georgetown. Was popular in years past when you could jump from cliffs & if lucky not hit a rock & break your neck. That side of water is now posted no trespassing. If caught you will get a citation. It’s basically a mud hole & not a place to dive. I have done 10-12 dives in Lake Georgetown but it’s been a couple years. You can access from Overlook Park which is free but limited parking. Also a good walk to the water from there. I have walked in from shore at Cedar Breaks Park which is right on the water and did a few dives off my boat in that general area. Most of the shoreline around Overlook area is rocky & stays like that to about 30-35’ After that it gets DARK & lots of silt & trees. Never went below 40’ as that’s my personal rule on solo dives, which these were. Vis was actually pretty good I thought for a TX lake. 10-20’ but at times it got where I could barely see my gauges. If I get a chance I’ll try to jump in again & give some better info. Stillhouse Hollow Lake in Belton, TX is nice & has a dive shop at the marina. There are 2 dive area’s with platforms, boats, etc.