The Turks & Caicos water gets its amazing color and clarity in part from the crushed pink coral sand bottom. This visibility, combined with coral heads and lots of multi-hued fish found in calm shallow water within sight of the sandy white shore, makes for some of the most accessible, but very worthwhile, snorkeling I've experienced. Best off all it is accessible right off Grace Bay Beach -- no need to take out the boat. If traveling with kids this is especially appealing as you can just stop when they get tired. It also works well for less confident swimmers. Try an area called Coral Gardens/Bight Reef (in front of Coral Gardens resort) or Smith's Reef, both on Grace Bay Beach.