15 of the World's Most Unique & Awesome Beaches - Avenly Lane Travel Benagil Sea Cave Beach – Algarve, Portugal! Click through to see 15 more of the world's most unique & awesome beaches! If you appreciate arts and crafts you'll will enjoy this info!
Open Ceiling Cave on Na Pali Coast, Kauai, Hawaii, USA. This cave is a hollowed-out lava tube, and may have served as a place where ancient Hawaiians could rest in their canoes when traveling along the coast.