Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Soria (55% of total searches to Castile and León). The next most popular destinations are Valladolid (18%) and León (18%). Searches for hotels in Salamanca (9%) are also popular.
KAYAK users have found double rooms in Castile and León for as cheap as $43 (Salamanca) in the last 3 days. The average price is $214.