Our aquarium is a favorite of all ages, and it’s just part of what makes Silverton Casino the best of the family hotel in Las Vegas. The mermaids have been featured in the media over the years and they have even assisted with Project Mermaids, a non-profit organization helping to bring awareness to Save Our Beach Foundation. Named the “Best Free Attraction in Las Vegas,” the Silverton Las Vegas aquarium holds more than 117,000 gallons of water, and it’s home to thousands of tropical fish. Yup, it’s a water attraction in the desert.