(TITC) - Today April 14th, 2022, Son Doong cave in Quang Binh, Vietnam - was officially discovered in 2009 as the world’s largest cave - is featured as Google's Doodle on Google homepage of 17 countries and territories, including: Vietnam, Virgin Islands (US territory), UK, Sweden, Greece, Singapore… On this occasion, the Vietnam National Administration of Tourism is coordinating with Google, Quang Binh Department of Tourism and Oxalis Adventure to promote the beautiful Son Doong and Phong Nha - Ke Bang…