An insight into the captivating world of cave diving, focusing on the exploration of the hidden underwater caves of Greece. Underwonder is a four-part documentary mini-series that introduces us to the spectacular yet challenging world of underwater caves in Greece. Following an experienced team of cave divers led by the explorer George Vandoros, each episode explores a new underwater cave, unveiling mysteries and stories hidden deep beneath the sea surface. The central theme revolves around the passion for exploration and the team's commitment to completing each mission, set against the backdrop of stunning underwater landscapes and enchanting underwater worlds.