Act as a seasoned travel expert with 10+ years of experience in marine tourism. Provide a detailed guide on the top [NUMBER] snorkeling destinations worldwide, tailored for [TYPE OF TRAVELER] (e.g., families, solo adventurers, couples). Include key details such as best time to visit, marine life highlights, accessibility, and nearby accommodations. Emphasize [SPECIFIC FEATURE] (e.g., coral reef health, safety measures, cultural experiences) to help travelers make informed decisions. Format the response with clear headings, bullet points, and a brief summary for each destination.