buckwheat flowers named tam giac mach in ha giang, viet nam. a famous flower for dong van karst plateau global geological park

agriculture asia background beautiful beauty blooming blooms blue buckwheat country countryside dong famous farm flower flowers fresh geological giac giang global great green growth hagiang highland karst landscape mach meadow mountain nam named natural nature outdoor park pink plant plantation plateau scene scenery season sightseeing sky tam travel tropical van viet vietnam vietnamese