The main international airports in Spain are Madrid-Barajas and Barcelona-El Prat, from there you can connect with other regions easily. From the main airports, or from a different city, you can take a bus or a train to León.
VUNDU is located next to multiple areas of natural and cultural interest. Having your own car or a rental one will allow you to move freely and visit the surrounding areas in case you want to explore. If looking to share a ride check blablacar
If you arrive to Madrid-Barajas Airport you can take a train to Chamartin Station (less than 30 min). From there you can take a fast train to Leon (around 2 hours) once you reach Leon the fastest way to reach La Mata de Curueño would be by car/taxi (40min)
If you arrive to Barcelona-El Prat you could go to Madrid and take a fast train to León (around 2 hours) and then a taxi to La mata de Curueño. Other option would be to take a plane to Valladolid (40 min) and then a bus/train from Valladolid to León, once you reach León you can take a taxi to La Mata de Curueño.