Prohodna Cave, located near Karlukovo in Bulgaria, is a unique natural rock formation famous for its 'Eyes of God' openings in the ceiling, offering a breathtaking natural spectacle. It is generally accessible with a short walk from a nearby parking area, though visitors should wear sturdy shoes as the cave floor can be uneven and slippery, especially during wet or cold conditions, potentially limiting wheelchair access. The cave can be explored independently, and there's no entry fee, though guided tours are available through local operators often combining it with other regional attractions. While open year-round, winter visits can pose challenges due to ice and snow, with spring and summer being ideal for comfortable exploration. A typical visit lasts between 30 minutes to 1.5 hours, allowing ample time for photography and appreciation of its unique geology and natural light effects. Visitors should be mindful of falling water or ice, especially near the openings, and note that bungee jumping is occasionally permitted from one of its larger entrances.