The Blue Grotto, also known as the Blue Cave, is a stunning natural wonder located on the small island of Biševo, near Vis island in Croatia. To reach the Blue Grotto, follow these steps: Travel to Split or Dubrovnik: Start by traveling to either Split or Dubrovnik, which are major cities in Croatia and popular starting points for visiting the Blue Grotto. Travel to Vis Island: From Split or Dubrovnik, take a ferry or catamaran to Vis island. Ferries usually depart from Split and take about 2.5 to 3.5 hours, depending on the route. Be sure to check the ferry schedule in advance. Travel to Biševo Island: Once you've reached Vis island, you'll need to take a local boat tour from the town of Komiža on Vis to the neighboring island of Biševo. The boat ride takes around 15-20 minutes. Visit the Blue Grotto: The boat tour will take you to the Blue Grotto on Biševo island. Due to the cave's entrance being quite small, you'll transfer to smaller boats or dinghies to enter the cave itself. Explore the Blue Grotto: Inside the cave, you'll be mesmerized by the ethereal blue light that illuminates the water. The sunlight reflects off the white seafloor, creating a surreal and enchanting atmosphere. Return to Vis or Split/Dubrovnik: After exploring the Blue Grotto, your boat tour will take you back to Komiža on Vis island, where you can catch a ferry or catamaran back to Split or Dubrovnik.