This is the greatest fresh-water aquarium. In addition to a giant aquarium with an underwater tunnel and a tropical rain forest, ENVI DŮM (ENVI HOUSE) offers also a video projection of natural beauties on a giant screen at “Projection at the Ray´s”. Should you be too tired after your tour, the “Piranha Café” is prepared for you where you can refresh while observing predatory piranhas. In the building there is also a family sports ground with a ricochet court, a sauna and a fitness room that offer active rest in private with the whole family.