The underwater pic is a spring off the west bank of the Wacissa River, nearly across the river from Big Blue Spring. See the westerly tangent on my GPS track:
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There are numerous spring-fed rivers and streams in Florida:
Rainbow springs & river
Silver springs & river
Ginnie Springs is off the Santa Fe which is tannic, but close to the Ichetucknee which is clear.
Econfina Creek is variably tannic with many springs on it.
Merritts Mill Pond is dammed and captures the flow from Jackson Blue, and the spillway follows a run to the Chipola, itself a gorgeous river.
Wacissa River and numerous springs
Upper St. Marks is clear, but the lower portion is very tidally influenced so no longer clear. Same with the Aucilla.
And of course, Wakulla Spring and the upper portion of the river. It too mixes with the St. Marks and flows out into the Gulf.
There are more of course, that list is just off the top of my head.