John Hummel interviewed at 52 centers of worship, in his weblog "52 weeks, 52 religions". I can't do that, but in interest of keeping the momentum, have set a goal to introduce 12 religions in 12 months. We'll see how it goes.
I'll include Zoroastrianism as the first, to get a head start.
If I run across additional information on a religion that I already posted, I'll add as a comment.
I'll try to keep it broad - there are thousands of religions, and variations on religions. I'm sure there is divergent evolution of religions, and convergent evolution as well. In the West, we are ethnocentric enough to look at faiths in comparison to Abrahamic religions, primarily Christianity, Islam, and Judaism. By examining nonAbrahamic faiths, we can look for human derivations of religion, commonality, and varity.
Please feel free to comment and discuss. I'm not a religious scholar. I'll use a variety of sources, and try not to depend exclusively on Wikipedia.
I'm not sure what the next religion will be. Meanwhile, here are a few images related to one person's "10 oldest temples in the world":
Knossos, Crete. The great palace was built gradually between 1700 and 1400 BC, not clear if religious, political, or a mixture.
Göbekli Tepe - site in modern Turkey, "erected by hunter-gatherers in the 10th millennium BC"
Ggantija Temples on Malta, "Constructed from 3,600-3,000 BC, the Ggantija temples are the earliest of a series of megalithic temples in Malta, pre-dating Egypt’s pyramids and Britain’s Stonehenge by over a 1,000 years"