4. Siesta Beach, Siesta Key, Florida
Certainly, a number of beaches on this list are famous for their spectacular white sand. But few of them can claim to have the whitest and softest sand in the world. For that reason, Siesta Beach is often considered the best of its kind in the lower 48 states. Even better? The sand is 99% quartz, making it nice and cool no matter how hot it is outside – no burning feet here!