Places
- Maryland -- Hagerstown1
- Maryland--Baltimore1
- Maryland--Baltimore County--Catonsville--St. Timothy's Hall1
- Maryland--Harford County1
- Massachusetts2
- Massachusetts -- Boston3
- Massachusetts--Franklin County1
- McLean House (Appomattox County, Va.)1
- Mexico2
- Mexico -- YucataÌn (State)1
- Miami-Dade Children's Courthouse1
- Michigan -- Niles1
- Micronesia (Federated States)--Ulithi1
- Middle East2
- Middle East -- Babylonia1