8. Bahá'í Temple
Location: 100 Linden Ave. Wilmette, Ill.
Practitioners of Bahá'í—independent religion founded over 100 years ago in Iran—only have 7 temples worldwide they can visit, one of which is just outside of Chicago in Wilmette. Completed in 1953, Chicago's Bahá'í Temple is a massive, dome-like structure impressive both for the detail of the building and the surrounding gardens and fountains.
Some famous practicioners of Bahá'í: Rainn Wilson (of The Office) and Tom Morey, the inventor of the Boogie Board.