Celina is a lovely little city and the county seat of Mercer County, Ohio. Located on the beautiful western shores of Grand Lake St. Marys, it is a destination where you can combine lake-related outdoor activities with all the perks that a popular tourist city as Celina, OH can offer. A few top Celina tourist attractions include the Immaculate Conception Catholic Church Complex with its distinctively beautiful Romanesque architecture and Grand Lake St. Marys State Park where you can enjoy a broad range of lake-related recreational outdoor activities. One of the most unusual events is the International Amphicar Owners Club’s major annual gathering being held every summer in Celina, OH. Regarding budget accommodation, there are more than 100 discount hotels worth checking in and nearby Celina, OH. The prices start from as little as $40 per room per night (2 guests) while the average price is around a $100.