Ohio History Connection
- Official OHS Website, formerly known as the Ohio Historical Society
Ohio History Central
- Online Encyclopedia of Ohio History
Cincinnati Museum Center
-Cincinnati Museum Center is a multi-museum complex housed in Union Terminal, an historic Art Deco train station and National Historic Landmark which includes the Cincinnati History Museum.
Historical Marker Database
- Online database of global historical markers and plaques
Remarkable Ohio
- Official Ohio Historical Marker database
Waymarking
- provides tools for you to catalog, mark and visit interesting and useful locations around the world
Geocaching
- Official Geocaching website. Players try to locate hidden containers, called geocaches, using a GPS-enabled device.
Exploring almost forgotten gravesites in Ohio
- Dedicated to cemetery preservation in the state of Ohio
