Fingal’s Cave, Inner Hebrides, Scotland. "Fingal's Cave is a sea cave on the uninhabited island of Staffa, in the Inner Hebrides of Scotland, part of a National Nature Reserve owned by the National Trust for Scotland" via Wikipedia.
Ice cave in the Skaftafell National Park in Iceland. Ice caves collapse and new ones form as each glacier grinds slowly towards the sea. Local guides can help you (without dying) find one. (Visit Skaftafell National Park in Iceland.
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!