An elevated rail tunnel from the Sonora mainland near el Sargento to Isla Tiburon across the Gulf of California which was abandoned due to lack of funding. It seems a shame not to use it for some precision flying :)
An airstrip with ICAO code PZ99 has been placed close to the northern entrance of the tunnel
The rail tunnel is 7.5 kilometers long and only 20 metres in diameter but with skill and the right aircraft I'm sure you can take on the challenge. Once commited to the entrance there is no going back so buckle up and enjoy the rush!
If you have the 'We love VFR' mod installed the tunnel will be filled with smoke in places :)
v1.0 1st release
v1.1 update to improve the collision detection in the tunnel (you have been warned :) )