Spilja (Grotta) in Croatia is home to several fascinating caves, each offering a distinct experience. Notable caves like Spilja Vranjaca, located near Split, provide impressive stalactite and stalagmite formations, accessible via guided tours. The Blue Cave on Biševo Island is renowned for its mesmerizing blue light, best viewed at midday. Other caves like the Baredine Cave near Poreč showcase unique underground chambers and even host the endemic olm amphibian. Whether you’re exploring geological wonders or enjoying serene boat tours, Croatia’s caves are a must-see for nature enthusiasts.