Our wooden vessel glided along Ha Long Bay’s jade green waters. Located off the coast of Northeastern Vietnam, its stunning 620 sq miles of seascape is one of the country’s five UNESCO World Heritage Sites. Hundreds of towering karsts dotted the horizon. Vendors in little skiffs tapped on the side of our vessel, selling unfamiliar exotic fruits – mangosteen, rambutan (aka Harry Cherry), longan, star and jack fruits.