Since their opening in March 2024, they have become a tourist hit, and anyone visiting Brno must see them. They often become the very reason for visiting this Moravian metropolis. These are the Yellow Hill Water Reservoirs, which remind some of mystical underground cathedrals, others of a world of long-lost civilizations, or the world of computer games, and you can explore them either on your own or with a guide. And while you're in Brno, be sure to visit other interesting underground spaces that the city has to offer.