Algar do Carvão is one of the Azores' hidden wonders, an ancient lava tube cave located on Terceira Island. Formed over thousands of years by volcanic activity, this cave offers an extraordinary underground adventure. The cave’s impressive size and unique volcanic formations create an awe-inspiring experience for visitors. A key feature is the subterranean lake that reflects the stalactites and stalagmites, adding a mystical element to the exploration. This lesser-known site is perfect for off-the-beaten-path travelers looking to immerse themselves in the geological marvels of the Azores. The lush surrounding area also contributes to the serene atmosphere, making it ideal for nature lovers and those interested in eco-tourism. Algar do Carvão’s underground world is an unforgettable experience that sets it apart from more traditional tourist attractions, positioning it as one of the Azores’ best-kept secrets for adventure and exploration.