Oasis 21 is a water-filled glass house built by Japanese people who focus on environmental protection. It is like a fish tank as big as a baseball field. The top floor is the "Water Cosmos Vessel", which is made of glass. It is a large container for rainwater. Rainwater can be used by other facilities to fully demonstrate the concept of environmental protection of natural energy recycling. There are also walkways for tourists to see special scenery. The next floor is the "Green Earth", a street park, and the next floor is the "bus terminus and underground. Railway Entrance", after leaving the station from this floor, you can first stroll around the shopping mall, Rongdu Street, next to Don Quixote, Nagoya TV Tower is also nearby.