1. The Blue Grotto is a natural cave formation located on the southern coast of Malta. The cave is known for its crystal-clear blue water that reflects off the surrounding limestone walls, creating an otherworldly atmosphere. The Blue Grotto offers visitors the opportunity to explore the caves both on foot and by boat, with tours available to take visitors along the coastline to various caves and inlets. The Blue Grotto is also home to a variety of marine life, and snorkeling and diving are popular activities in the area.

2. The Blue Grotto is open daily from 9 a.m. to 5 p.m. You can call the visitor center at +356 2169 1619 for more information.

3. Entrance to the Blue Grotto is free, but there is a fee for boat tours. Boat tours cost around €8-€10 per person. The Blue Grotto is located about 20 minutes from Valletta by car, and there is also a bus service that runs to the area. However, it is recommended that visitors hire a car or take a taxi to reach the site, as the bus service can be infrequent and unreliable. There is a car park near the entrance to the site, and parking is free.