Kylmäpihlaja is one of the outermost islands in Rauma archipelago. There's a lighthouse on the island which was built in 1953, and now works as a hotel and a restaurant. The rooms are located in the lighthouse tower up to the 8th floor. The 9th floor is used as a viewing platform. There's also a souvenir shop and a café with an outdoor terrace. There are 2 saunas on the island: a general sauna and little sauna on the seaside rocks with a hot tub for private use.