Read the following passage then answer the questions.

Sapa is a small town in Lao Cai. It is famous for its natural sites including Silver Waterfall, Ham Rong Mountain, Rattan Bridge, Ta Phin Cave and the peak of Fansipan Mountain, which is considered the rooftop of Indochina. In the past, it used to take people many days to reach the peak. Thanks to the cable car system which was completed in early 2015, visitors now can easily reach the peak of Fansipan Mountain in about 20 minutes. The system, which is considered the longest and highest of its kind in the world, runs from Sapa town to the peak of Fansipan Mountain, and is able to transport 2,000 people each hour. From the cable cars, visitors can enjoy the wonderful landscapes and pure air of the beautiful mountainous town.

1. How long did it take visitors to reach the peak of Fansipan Mountain in the past?

2. Is the cable car system the longest and highest of its kind in the world?

3. What can visitors do from the cable cars system?

4. What are natural sites in Sapa?