Katajanokka is an area adjacent to the central district of Helsinki. It's my favorite part of Helsinki, having magnificent buildings and being in its western part. The Uspenski Cathedral is one of my favorite places in Helsinki as well and one of the star tourist attractions. If you climb to the viewpoint of the cathedral there are some very good city and harbor views. The southern part of this district is dominated by the port and large ships departing or cruises to Tallinn, Stockholm and Marieenhamina (the capital of Åland islands set midway between Sweden and Finland). The rest of the district comprises housing cooperatives and some small parks like the one in front of Uspenski.