Unless you snorkel or open your eyes underwater, you might not have seen what it looks like underwater at Barton Springs, where the water is a cool 70 to 74 degrees.

This is the color of Barton Springs in the middle of July. Addie Broyles / American-Statesman

WATCH: Barton Springs isn’t really 68 degrees. How warm is it?

Well, have a look.

I took this video earlier today with my iPhone in an underwater case that was the best impulse buy of last summer.

RELATED: Former Barton Springs lifeguards recall life on the stand

As temperatures continues to rise, Barton Springs will fill up earlier each day.

Here are a few tips so you can enjoy your own visit:

Parking is already someone chaotic already, so be prepared to walk from one of the upper parking lots in Zilker Park.Entry fee is $3 if you’re a resident of Austin, $8 if you’re not. Kids are $1 or $2, depending on their age.You can pay with a card at one of the meters outside both the north and south entrances.Bring a floatie, but leave the food and drinks behind. You can’t bring anything to eat or drink besides water into Barton Springs. Entrance to the pool is free before 8 a.m. and after 9 p.m. The pool opens at 5 a.m. and closes at 10 p.m.On full moon nights, where people flock to the pool to howl at the moon, the park can fill to capacity, so don’t wait until 9 p.m. if you really want to get in.

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