Usually in temples, theaters, historical monuments, water parks etc they'll allow you to carry the cam. They just need to make sure you don't shoot, so you can always leave your memory card or battery with them for that purpose.
Water parks usually have lockers, so you can stash you camera there too
And usually these people are pretty tolerant if you tell them upfront, they know they can't stop everything. Mobiles will enter, and all of them have cameras (and good ones) these days