The term 'Picturesque Cave' can be described as a GROTTO, which is a 6-letter word. A GROTTO is a natural or artificial cave used for shelter, decoration, or as a tourist attraction. Grottos are often found in mountainous regions and are known for their unique and beautiful formations. They are often filled with stalactites and stalagmites, which are formed by the slow dripping of water over time. Grottos are also known for their picturesque views, making them popular destinations for tourists.