Which UNESCO World Heritage Site in Vietnam is famous for its limestone karsts and isles?
A Nha Phu Bay
B Hạ Long Bay
C Vinh Hy Bay
Correct Answer: Hạ Long Bay
Which UNESCO World Heritage Site in Vietnam is famous for its limestone karsts and isles?
A Nha Phu Bay
B Hạ Long Bay
C Vinh Hy Bay
Correct Answer: Hạ Long Bay