The Lake of Land and Heaven is the lake where Freud first trained during he is grade 4 and during the first time he become a member of the ORB FORCES.
The place was a wide lake and the water is only 3 feet deep but warriors can use their force powers to stand on the water. This place is important as this is the place where Freud first learned his FLARE RASENGGAN, and during the start of the 2nd arc, he often trains here alone.
During the 3rd arc, Freud and Stealth Assassin fought each other here, one on one. They caused a great destruction but the heart of the lake is not destroyed and was preserved.