Luchon is great did a week there this may, stayed in apartment just off main street, some classic road climbs and plenty of off roading.
Camino de Santiago, cycled some of it very very good on French side
Prades nr perpigan brillant type VTT Prades into google for routes.
Cantbria Spain, been this July and stayed in Potes Picos de Euopa without bike very very classy, link http://www.cantabriaenbici.es/index-en.html#Introduccion
Finale Ligura not been but on the list to do or Tuscan Alps,
Dordogne around sarlat great xc tracks well worth a ride
Vosages, stayed at Kayserburg brilliant all day trails
This country
Lakes district/Howgills
Scotland
Enjoy