This site from the Ohio Division of Travel and Tourism has a calendar of events, has a featured destination of the month, brief information on each large city, and allows you to book a room through the Ohio Hotels and Lodging Association's website.
Frommers.com: In the Heartland: An Ohio Road Trip by RV, Part I
This road trip covers about 1,000 miles, hitting all three major cities.
Ohio Bed and Breakfast Association
You can search for a Bed and Breakfast throughout the state
Ohio Hotel and Lodging Association Online Reservations
Search for and make reservations at hotels throughout the state with this site from the Ohio Hotel and Lodging Association
Ohio State Park Lodges
Ohio State Park Resorts and Conference Centers. Seven unique resorts open year-round
Buckeye Trail - Ohio
This trail links the four corners of Ohio in a circuit running from Headland Dunes State Park on Lake Erie, south to Cincinnati and back around the state to the west. A very well developed site with trail information for all stages of the circuit.
Marietta, Ohio: A Historic River Town Where the West Began
A New York Times travel escape article for Friday, November 06, 2009.
Ohio Canal Corridor
Learn about the effort to create a park system that follows the route of the historic Ohio Canal from Cleveland through Zoar to Dover/New Philadelphia.
Information on visiting an Ohio winery.
News and Articles
The website allows you to search through their archive of articles by location.
A Visitor's Guide from Cincinnati.com, The Cincinnati Enquirer and the Greater Cincinnati Convention & Visitors Bureau (GCCVB).
Northern Kentucky: The South Side of Cincinnati
Information from the Northern Kentucky Convention and Visitors Bureau.