Last Spring is about 100 yards south of the canal gate (200 yards south of Double Spring and Harney Road). You can see the canal gate when heading north on I-75, just before the Fowler Ave. exit.
Last Spring is a small, shallow system. The visibility of the canal was around 5-7 feet with the same in the cavern entrance. On my visit I had already been in Double Springs for 30 minutes in a bathing suit in March and didn't have my cave lights or equipment to see anything. I'll check out this site sometime soon when I get bored for an afternoon. This map was painstakingly hand drawn by Tampa diver Brett Hemphill (of Wayne's World fame).
Click here for Last Spring map
Click here for Temple Terrace Aerial
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