cali love we have everything. one day at the beach. one day in the mountains one day in the desert..... can even check out the forest if you head up north.... what more can you ask for?
Correct me if I'm wrong, but there's caves close by in Tennessee/Kentucky as well? And one of the largest aquariums, Ripley's Aquarium - it looks amazing, and is definitely on my list.
http://www.ripleysaquariumofthesmokies.com/
If you go in the fall, I think the colors are quite amazing. You could get some camping and fishing done too - I'm hoping to go myself this year.
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My girl and I are heading to the Fl. Keys in June (6/4-6/8) for my vacation and I'm looking forward to it.
We're staying here. http://www.islanderfloridakeys.com/
Driving down should be a hoot. :/
We plan on doing some fishing, snorkeling, swimming, relaxing on the beach, getting drunkand visiting the "Theater of the Sea" http://www.theaterofthesea.com/. Fun stuff. Hope the weather is nice.