Royalty free image: US Capitol Tours sign in Washington, D.C.

Royalty free image: Mosaic tile directional arrow sign with green arrow pointing right.

Royalty free image: Church St. street sign in the gay district of Toronto, Canada.

Royalty free image: Danger Work Overhead warning sign at a construction site

Royalty free image: Red and white no entry sign over a black and yellow striped warning sign.

Royalty free image: Solitary fir tree beside snow-covered frozen lake or body of water.

Royalty free image: Madison Avenue street sign in Manhattan, New York.

Royalty free image: Please Stay Off The Grass sign

Royalty free image: CABANAS directional arrow sign in tropical location.

Royalty free image: Caution, pedestrian crossing ahead sign.

Royalty free image: Please Pay Here sign with arrow pointing down.

Royalty free image: Highway lane closure barricades receding into the distance.

Royalty free image: Blank yellow directional sign with a black arrow pointing ahead or up.

Royalty free image: NO EXIT and no right turn sign on an exterior wall.

Royalty free image: Skull and crossbones danger symbol sign.

Royalty free image: DANGER sign with blank space and nailed to a plywood wall.

Royalty free image: Old-fashioned Department of Purchasing and Supply Receiving sign.

Royalty free image: Communications tower.

Royalty free image: Sign with graphic of person pushing a shopping cart.

Royalty free image: Info information sign with a question mark and directional arrow pointing right.

Royalty free image: Road sign indicating two options ahead - continue straight and stop or curve right and yield.

Royalty free image: Two blank directional arrow signs pointing in the same direction.

Royalty free image: Blue sign with numbers 1, 2, 3 and an arrow pointing right.

Royalty free image: Biohazard symbol sign on a chain link fence with rusted drums or containers in the background.