angles arched arches beams bricked bricks brickwork colonnade columns cover covered dark darkened height high historic light open-sided pathway pavement paving pedestrian people perspective perspectives pillars posts roof roofing secure security shade shadow shadows shelter stonework strength strong structure structures sunlight sunshine support view views walking walkway appearances architectural architecture box-like buildings business-district city city-scapes city-views color colour contemporary contrast contrasting distance distant elements exterior external glass gray grey heights high-rise Hong Kong linear lines modern office-buildings rectangles rectangular skyscrapers style walls wealth windows active activities adventure adventure-playground children children’s-playground climbing climbing-platform curved curves equipment families fun kids leisure lookout observation-platform park path paths peaceful picnic playground playing public quiet rails relaxing safety shaded shady sheltered stairs steps tranquil trees viewing-platform visitors wood wooden cliff coast coastline look out ocean picturesque ponder pondering sea sky surf colorado Denver mile high city mountains panorama Rocky Mountains skyline usa