Deserts, forests and mountain peaks inspired the design of tech company Slack's 10-storey office in San Francisco, which is meant to embody "the similarities between hiking a wilderness trail and working".
The Slack Headquarters is located within a 16-year-old building in the downtown district, near gleaming new skyscrapers such as the Salesforce Tower by Pelli Clarke Pelli and The Avery by OMA.

Rising 10 storeys, the Slack building is leased by the tech company, which was founded in 2009 and offers cloud-based tools, like messaging, for collaboration.
While conceiving the interiors for the 300,000-square-foot (27,871-square-metre) office building, Studio O+A took inspiration from Slack's CEO, Stewart Butterfield, an avid hiker who goes off grid every year to spend time in wilderness.
The design, which has been longlisted for a 2019 Dezeen Award, specifically draws upon the varied landscapes that define the Pacific Crest Trail, a 2,653-mile (4,270-kilometre) trail that stretches from California to British Columbia.
Within the building, each level is assigned a topographical theme, beginning with a desert plain on the first floor and culminating with a mountain summit on the top level.

"O+A's concept was to create a floor-by-floor evocation of those landscapes ? in effect, to turn a trip up the elevator into a virtual trip from Baja to the Pacific Northwest," the team said. "The idea was to not only suggest a variety of topographical and botanic...