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The more B&W shooters we get the better! Good choice of B&W on the stone portico. The water scene could more likely go either way, depending on the sky and other colors (or lack thereof), but certainly looks to have enough form, shape, contrast and texture to pull off B&W, and I thnk you did well with it.
I'm not sure you have a true black point, and it might benefit from pushing that a bit. The reflected white on the water is a little distracting, white being such a magnet for our eyes, and might have been minimized with a polarizing filter. I plan to use a polarizer for all my water shots, realizing that they will not always help, as they only have maximal effect at 90 degrees orientation to the incident light..
If you've not already, look through Donald Mackenzie's posts. He has a gift for and is a real student of B&W, and is agreat resource for us all.