SAVE Winter's almost here. Let the only ice in your life be an ice-cream cone at Latté Da after a day of shell collecting. Home to 250 types of seashells, this is the No. 1 shell- ing destination in the world. Head to Blind Pass, as Sanibel gives way to Captiva, where a giant shell mound might just be Florida's tallest mountain. Sanibel and Captiva have an east-west orientation (as opposed to north-south like most islands), so the curve of the shoreline acts as a natural scoop for all the seashells that collect here. Find horse conchs, lightning whelk, tulip shells and sand dollars, as well as clam and oyster shells completely intact — just make sure you don't pick up a live one. Count 'em all up back at the Captiva Island Inn (from $99 a night, captivaislandinn.com), a mere block from the beach, and order grilled grouper reubens from RC Otters next door to eat on the balcony of your cottage.