The Metropolitan Museum of Art
One of the world's largest art museums, on Fifth Avenue's Museum Mile
Halifax Citadel National Historic Site
Star-shaped hilltop fortress overlooking downtown Halifax and the harbour
Art Institute of Chicago
World-renowned art museum in Grant Park, home to American Gothic and Seurat's Sunday Afternoon
Empire State Building
Iconic Art Deco skyscraper with 86th- and 102nd-floor observatories
Dundurn Castle
1830s Italianate villa and National Historic Site
Skydeck Chicago
103rd-floor observation deck and The Ledge glass balconies atop Willis Tower
Maritime Museum of the Atlantic
Canada's oldest maritime museum, home to a renowned Titanic exhibition
San Diego Zoo
World-famous zoo in Balboa Park, home to more than 3,500 animals
Art Gallery of Hamilton
One of Canada's longest-running public art galleries
Getty Center
Hilltop museum of art, gardens and architecture — always free
Philadelphia Museum of Art
World-class art museum atop the famous Rocky Steps
Griffith Observatory
LA's iconic hilltop observatory above the city