Free things to do in Cambridge & Inner Suburbs, Boston

Longfellow House–Washington's Headquarters National Historic Site

📍 Cambridge · Cambridge & Inner Suburbs

NPS historic house that served as George Washington's headquarters during the siege of Boston and later as the home of poet Henry Wadsworth Longfellow. Free guided house tours when offered.

🕑 Hours vary by season; see the official page

✓ Checked on the official page Nov 3, 2026