This is a lighthouse off the Summerside downtown waterfront, originally built in 1881. I love the single big puffy cloud in the sky above the lighthouse. Apparently that stone breakwater connecting it to the land is completely submerged at high tide.
A closer look:
Here are a couple of really cool websites showing it in more detail:
http://marinas.com/view/lighthouse/966_Indian_Head_Lighthouse_Summerside_PE_Canada