Fußgängerbrücke an der Yale University, in New Haven, Connecticut. - Stockfoto & -bild

Pedestrian bridge at Yale University, in New Haven, Connecticut.

Pedestrian bridge at Yale University, in New Haven, Connecticut.

Photo of sporty people with bicycle outdoor, spend Holiday By Bike

Alley in green city park with grass and trees, nobody.

Walkway and gardens outside the Massachusetts State House, in Beacon Hill, Boston, Massachusetts.

Gardens along a walkway outside the Pittock Mansion, in Portland, Oregon.

Graffiti and autumn color at Helmholtzplatz, in Prenzlauer Berg, Berlin, Germany.

Stairs and tree in a small park near Foggy Bottom, Washington, DC.

Trees along a path at Suomenlinna, in Helsinki, Finland.

Autumn color along a walkway at Botanisk Have, in Copenhagen, Denmark.

Walkway and trees, at the Allan Gardens, in the Garden District, Toronto, Ontario.

Trees and walkway at the Massachusetts Institute of Technology, in Cambridge, Massachusetts.