Panoramic view of a fountain and rotunda, The Exploratorium, San Francisco, California, USA

building tourist leisure activity spare time leisure activity leisure leisure time leisurely spare time free time free time architectural feature traveling ancient arch building exterior building structure california clear sky color colour color image column day dome fence safety protection security fountain greenery high angle view landmark lush foliage ornate outdoors panoramic plant pond pool railing rear view rotunda san francisco sitting sky splashing spraying the exploratorium tree two people usa us united states of america america united states north america vertical water architecture nature recreational pursuit journey photography