Plaza de Regla s/n
León, Spain, 24001

The machine is located in front of a souvenirs shop, just besides the Tourist Information Center.

Each design costs 1 euro to make, and you turn a 5 cent euro coin into the "penny". There are 4 designs available:
1) Colegiata de San Isidoro (Saint Isidoro Collegiate Church)
2) Catedral de León (León Cathedral)
3) Monasterio de San Marcos (Saint Marcus Monastery)
4) Virgen del Camino (Virgin of the Path)

9/17/12: Designs are very clear.