Start with pickup from your hotel in Sarajevo and travel to the town of Visoko. Arrive at the Ravne tunnel complex where you will meet your local guide and get equipped with your safety gear. Enter the mystical labyrinth underneath the pyramid structure outside the town. Due to the huge network of underground tunnels, intersections, chambers and water accumulations, it is not possible to explore without a local. Learn about the construction and purpose of the tunnels which wind underneath the pyramid. Learn about the theories behind the pyramid, and who may have constructed it. Afterwards, enjoy some free time in the Ravne tunnel complex, before being returned to your hotel.