skyway, pedestrian bridge, walkway, atrium, underpass, galleria, plaza, viaduct, concourse, footbridge, riverfront, breezeway, monorail, lightrail, corridor, expressway, overpass, archway, bridge, underbridge, entryway, travelator, greenway, arches, bikeway, streetcar, stairway, tower, downtown, spiral staircase, breezeways, elevator, staircase, boardwalk, ropeway, causeway, elevator shaft, frontage road, sidewalk, renovation, girders, tram, trestles, entranceway, promenade, crossway, gondola, parkway, truss bridge, suspension bridge, millrace, floors, guideway, superblock, skylight, boulevard, railings, midtown, mall, trolley, escalator, skyscraper, seawall, piers, tunnel, colonnade, frontage, tacoma narrows bridge, canal, willamette river, retaining wall, portico, handrail, aerial tramway, bailey bridge, terrace, spire, building, bell tower, gangway, snowshed, mass rapid transit, bandshell, amphitheater, passageway, trestle bridge, balcony, observation tower, roadbed, esplanade, headrace, stairwell, highrise, pergola, railyard, clock tower, interchange, falsework, river, freight elevator, freeway, roof