Re: What are these? ( Cast Iron Pipe Outside)
Unless you've only got two places on the house where downspouts could go, and these pipes are located in those spots, then it could be possible that they're downspout leads.
More than likely they are clean-outs for the drain system on the house, which should be capped (rubber cap with a pipe clamp ). Their location will tell you more about what they are than anything else.
I suffer from CDO ... Its like OCD, but in alphabetical order, LIKE IT SHOULD BE!!!