Question 1: Where is Hang Rai?
- Vietnam
- Laos
- Cambodia
Correct Answer: Vietnam
Fact: Vietnam is on the eastern edge of mainland Southeast Asia. Hanoi is the capital city, while the bustling metropolis of Ho Chi Minh City is its largest urban center. The country hosts several natural wonders like Hạ Long Bay, Yến River, and Bản-Giốc Waterfalls, and Hang Rai is one of them.
Question 2: Which bay in Vietnam is famous for its limestone karsts and isles?
- Hạ Long Bay
- Vinh Hy Bay
- Nha Phu Bay
Correct Answer: Hạ Long Bay
Fact: Hạ Long Bay is a World Heritage Site in northeastern Vietnam. Its thousands of limestone karsts and islets were sculpted by nature into a myriad of shapes and sizes.
Question 3: Which is the longest cave system in the world?
- Deer Cave
- Phong Nha cave
- Mammoth Cave
Correct Answer: Mammoth Cave
Fact: Mammoth Cave, in Kentucky's Mammoth Cave National Park, draws spelunkers and adventurers into its depths. So far, over 426 miles of the cave have been mapped. Since 1972, the cave has been officially recognized as the Mammoth-Flint Ridge Cave System following the discovery of a connection between Mammoth Cave and the extensive caves beneath Flint Ridge to the north.