Lily pond would work in size, but not in the fact that it is right on the runway approach of the airport, so this means
it should be considered a NO FLYING area!
Depending on the size of the aircraft, one needs about 1/2 to a full football field of flying space (as a minimum). Some aircraft could be flown from a little league sized baseball field. The maximum can be a lot larger, depending on the aircraft, flying style, pilots skills, wind, and conditions, etc.
Depending on the size of the aircraft, you need about 100 to 300 ft long, 30 to 50 ft wide runway (or more) to take off / land. Some aircraft can take off in 10 feet, but normally you want more space. For example, my RC helicopter only needs about 5 to 6 foot circle to take off and land, but I'd want much more space to fly.
Also, we don't want to fly directly over people, houses, etc. Normally we can fly from 'mowed' grass, or from hardtop/concrete, dirt, etc. Obviously (or not) if a plane has floats, it can fly from water.
I hope this helps a bit.