This is model of a London Aquatics Centre Project.I did it by using rhinoceros 3d.I also have a youtube channel that i share tutorials of my 3d projects including this one.You can check my channel.
OBJ (OBJ, filesize: 90.8 MB), 3DM (Rhinoceros 3D, filesize: 46.9 MB), FBX (Autodesk FBX, filesize: 14.1 MB), SKP (Sketchup, filesize: 25.6 MB)