• Maitland Art Center
• Mariners' Museum
• Mark Twain House and Museum
• Maryland Science Center
• Maryland Zoo Baltimore
• McCormick Place
• Mennello Museum of American Art
• Metropolitan Museum of Art
• Miami Art Museum
• Millennium Park
• Morikami Museum and Japanese Gardens
• Morton Arboretum
• Museum of Discovery and Science
• Museum of Indian Culture
• Museum of Modern Art
• Museum of Natural History
• Museum of Science and Industry
• Mystic Aquarium & Institute for Exploration
• Mystic Seaport