As far as landing goes, it's considered the most challenging airport in the world. Landings in this airport are described as terrifying and breathtaking. Approaching the airport you will see 18,000 foot tall peaks on both sides of the valley and you are likely to make a crosswind landing

The airport is located at a mile and a half above sea level. The runway is 6,445 feet long, which means that it is shorter than its elevation. The 8 pilots manage to bring more than 30,000 people per year into this airport located in Asia. The pilots encounter vicious winds in the valley where the airport is located. (Source)

With surrounding peaks as high as 18,000 ft (5,500 m) it is considered one of the world's most challenging airports, and as of October 2009, only eight pilots in the world are certified to land at the airport. Flights at Paro are allowed under visual meteorological conditions only and are restricted to daylight hours from sunrise to sunset.(Wiki)

Landing at Paro Airport has been described by many people as breathtaking. Conversely, the tiny airstrip situated a mile and a half above sea level has also been described as completely terrifying and is roundly regarded as one of the most challenging airports to land in the world.(Source)