This image depicts an indoor blacklight bouldering gym, identified as Boulder Bar NASA, located at Nádražní 32, 702 00 Ostrava, Czechia

This image depicts an indoor blacklight bouldering gym, identified as Boulder Bar NASA, located at Nádražní 32, 702 00 Ostrava, Czechia. The environment is dark, predominantly illuminated by ultraviolet light, casting a deep purple hue across the scene. Approximately 15 to 20 individuals, mostly young adults, are present. The bouldering walls are dark-colored, featuring numerous fluorescent climbing holds in vivid orange and green. The word "NASA" is distinctly visible in fluorescent green on a sloped bouldering wall in the mid-right background. The floor is a dark matte surface, marked with glowing orange and green geometric patterns and lines, including a prominent "Z" character on a lower step in the foreground. Individuals are observed in various states of activity and rest. Some are standing, such as a male figure on the far left with hands on his hips, wearing white shorts that glow under the blacklight. Others are seated on the floor or low platforms, with some clothing and accessories exhibiting fluorescence. Objects visible on the floor include shoes and bags. Motion blur affects several individuals, indicating movement within the active recreational space. The overall scene conveys an energetic atmosphere characteristic of an indoor bouldering facility at night.