The tree thing is:
Cuneafractalumin Tree, by me - another Blender thing I might release as a freebie.

The other thing on the red pole is:
Sculpture, Abstract, Halvos, by me - another Blender thing I might release as a freebie.

The arc footprint benches are:
Bench Arc Fountain Barcelona, by #Pers# : https://3dsky.org/3dmodels/show/skamia_dugovaia_fontana_barselona_1

Swimming pool and big room around the swimming pool is:
Pool, Swimming, Convoluted, V1, by me, Luke Turner: https://www.renderhub.com/lukon/pool-swimming-convoluted-v1