Milford sound in New Zealand is very fun.
The trees lining the runway are so close. Once up, depending on heading, you’ve gotta get from ~30ft to 10,000 feet or so to clear surrounding peaks.
In MSFS2002, there was also an airport I think in South America. It was situated deep inside a crater, and you had to circle within the crater to land or get out. Does anyone know airport I’m referrring to?