Supertrees at Gardens by the Bay

Postcard SG-154122 from Singapore shows the Supertrees, 25-50 meter (82-160 feet) tall tree-like structures that serve as vertical gardens at Gardens by the Bay (滨海湾花园) in Singapore. Built on 101 hectares or 1,010,000 square miles of reclaimed land adjacent to the Marina Reservoir, Garden by the Bay is an urban park consisting of three waterfront gardens as a part of the strategy by the Singapore government to transform Singapore from a "Garden City" to a "City in a Garden".

According to Wikepedia, "the Supertrees are home to enclaves of unique and exotic ferns, vines, orchids and also a vast collection of bromeliads such as Tillandsia, amongst other plants. They are fitted with environmental technologies that mimic the ecological function of trees – photovoltaic cells that harness solar energy which can be used for some of the functions of the Supertrees, such as lighting, just like how trees photosynthesize; and collection of rainwater for use in irrigation and fountain displays, exactly like how trees absorb rainwater for growth. The Supertrees also serve air intake and exhaust functions as part of the conservatories' cooling systems."