The Salesforce Transit Center links 11 transit systems and includes a 5-acre rooftop park that anchors the growth of a new mixed-use neighborhood. The park is composed of curving paths that lead visitors through a series of contemplative and social settings. To create a topography that blurs the distinction between roof and ground, the park integrates mounded vegetated hills with domed architectural skylights that allow light into the terminal below. The park was designed as a multifunctional space providing respite, activity and education for transit users, office workers and local residents.