I lived near this BAPS Shri Swaminaryan Mandir Temple while it was being constructed and marveled at the engineering beauty.  Genia and I decided to take a tour of the complex grounds to see the architecture which is free to the public.  Unfortunately, photos are not allowed inside the temple.  Note that Genia and I are Christians, and we found the people volunteering to allow visitors very courteous and were there to explain any questions proposed to them.