Those who have an interest in all things nautical will want to visit Santarems Harbor. It's a nice place to go for a walk along the waterfront and admire some boats.
This place for ships to anchor in Santarém comes recommended by many travelers, so put it on your travel plans. Don't think the sightseeing ends there, however. There are loads more attractions waiting for you to check out after Santarem's Harbor. Pajucara Beach, Paraiso Shopping Center, and Maracana Beach are not far away.