What is the most useless fact you know?

What is the most useless fact you know?
The Paro Airport at Bhutan.

It’s Bhutan’s sole International Airport among the four airports in the Kingdom of Bhutan.

It’s surrounded by mountains as high as 18,000 ft. and is considered to be one of the most dangerous and challenging airport’s in the world.

Its runway is just 1,964 m in length, making it a huge challenge for large aircrafts to land at the airport.

The unique fact of this airport:

Only 8 pilots (worldwide) are certified to land at this airport.