Grand Lake St. Marys State Park

The Grand Lake St. Marys Lighthouse, also known as the "Northwoods Lighthouse", is a historic lighthouse on Grand Lake St. Marys, a reservoir in the far western part of the U.S. state of Ohio. Located east of the city of Celina in Mercer County, the lighthouse was built in 1923, using a plan modeled after the Eddystone Lighthouse off the coast of Cornwall in the United Kingdom.

Franklin Township is one of the fourteen townships of Mercer County, Ohio, United States. The 2020 census found 2,511 people in the township.

Montezuma is a village in Mercer County, Ohio, United States. The population was 152 at the 2020 census.

Celina Senior High School is a public high school located in Celina, Ohio, United States. It is the only high school in the city. Their mascot is a bulldog. They are members of the Western Buckeye League. The average enrollment is around 1,100 students.

Lakefield Airport (ICAO: KCQA, FAA LID: CQA) is a publicly owned, public use airport located four miles south of Celina, Ohio. The airport sits on 122 acres at an elevation of 894 feet.The Lakefield Airport Authority received a $135,000 grant from the Federal Aviation Administration in 2022 to purchase extra land for land development. The airport received an additional $95,000 grant in 2023 to conduct an airport drainage study.

Jefferson Township is one of the fourteen townships of Mercer County, Ohio, United States. The 2020 census found 13,802 people in the township.

Celina ( sə-LY-nə) is a city in and the county seat of Mercer County, Ohio, United States about 58 miles (93 km) northwest of Dayton. The population was 10,935 at the 2020 census. Celina is situated on the northwestern shores of Grand Lake St. Marys.

Immaculate Conception Catholic Church is a parish of the Roman Catholic Church in Celina, Ohio, United States. Founded later than many other Catholic parishes in the heavily Catholic region of western Ohio, it owns a complex of buildings constructed in the early 20th century that have been designated historic sites because of their architecture. Leading among them is its massive church, built in the Romanesque Revival style just 43 years after the first Catholic moved into the city: it has been called northwestern Ohio's grandest church building.

Neptune is an unincorporated community in Mercer County, in the U.S. state of Ohio.

Villa Nova is an unincorporated community in Saint Marys Township, Auglaize County, Ohio, United States. It is located just west of Saint Marys on the northeastern corner of Grand Lake at the intersection of Ohio State Route 703 (Celina Road) and Ohio State Route 364 (Park Road), at 40°32′43″N 84°25′29″W.

Bulkhead is an unincorporated community in Saint Marys Township, Auglaize County, Ohio, United States. It is located southwest of St. Marys on the eastern shore of Grand Lake along Ohio State Route 364, at 40°31′14″N 84°25′17″W.One of the Miami and Erie Canal feeder canals is located in Bulkhead.

Center Township is one of the fourteen townships of Mercer County, Ohio, United States. The 2020 census found 1,099 people in the township.