Pictured above is a low bridge built in Indonesia to span a river in a nature reserve on Moyo Island. The bridge is made using roughly sawn locally sourced branches lashed together with vines. The branches are joined like a raft, supported at intervals by a frame lodged in the river bed, which extends into a rail. More branches are angled diagonally into the river bed to brace the sides. The bridge to the right spans a natural pool at the Bambu Indah Hotel (See p 62). It is made entirely with bamboo; Three thick lengths of bamboo spanning the stream with an arched truss woven walkway over the top. The bridge is designed as a portable element so that it can be moved during floods or moved when new pathways are required, rocks are used to anchor the bridge in place. The vortex shown in the photograph on the facing page is a system in place at the Green School in Bali to harness hydro-energy from the fast flowing Ayung River which runs through the site. This environmentally friendly technology developed by Frank Zotela is in its early stages of development. Right: photograph from the Cave Urban field trip to Indonesia, September 2011. Above: photograph from Cave Urban field trip to Vietnam in June 2011 depicts a bridge made with timber branches on Moyo Island. Opposite: photograph by Esther Au Yong, image available online: http://ourtravelations.com/page/2/
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