AdventureLuxuryNatureWellness 23 of the Most Beautiful Beaches in the World Advertisements 10. Trunk Bay, St. John, U.S. Virgin Islands wallpaperstudio10.com Trunk Bay in the United States Virgin Island is a quarter of a mile long white sand beach with palm trees an safe swimming. A marked underwater snorkeling trail runs along much of the length of the beach to explore sea life and coral. Advertisements