A semi-submarine is a vessel that has a submerged lower deck with large viewing windows, allowing passengers to observe underwater marine life and coral reefs without getting wet. These vessels are ideal for people who want to explore the underwater world but don't want to go scuba diving or snorkeling.

During a semi-submarine tour from Agios Nikolaos, you can expect to see a variety of marine life, including colorful fish, sea turtles, and maybe even dolphins or whales, depending on the season. Some tours also include stops at nearby islands or secluded beaches where you can swim and relax.

Website: https://www.semi-submarine.gr/