Start your day with a convenient hotel pick-up before heading out on a scenic transfer /90 min/ across the stunning Balkan Mountains. Once you arrive, you'll descend into Saeva Dupka, which feels like stepping into a hidden underground palace filled with vivid mineral colors and rock formations. Next, head to Prohodna Cave /30 min transfer/, where you can walk under massive arches and look up at the “Eyes of God.” Watch the light pour through those natural skylights, creating a cinematic experience that blends mountain views with unforgettable underground exploration.