States: O-T

- Places in each state with kids (Yes, we actually visited universities) 
*Places we visited without kids.

Ohio

Oklahoma

Oregon
- Crater Lake National Park
- Oregon Caves National Monument

Pennsylvania
- College of Physicians of Philadelphia Building
     - Benjamin Rush Medicinal Plant Garden
- Independence National Historical Park
     - Independence Hall
     - Liberty Bell
- Mutter Museum
- Philadelphia Museum of Art
- Philadelphia Old City area
- Valley Forge National Historical Park
- Washington Crossing National Historical Landmark

Rhode Island

South Carolina
- Boone Hall Plantation
- Cypress Gardens
- Fort Sumter National Monument

South Dakota
- Badlands National Park
* Deadwood Historic District
- Mount Rushmore National Memorial
- National Grasslands Visitor Center
- Prairie Homestead with white prairie dogs
- The Ranch Store to feed prairie dogs

Tennessee
- Cumberland Gap National Historic Park
- Great Smoky Mountains National Park
* The Hermitage

Texas