Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular region to stay in Europe is Dublin. England and Cork are also very popular.
Based on KAYAK hotel searches, the most popular country to stay in Europe is Ireland. Spain and United Kingdom are also very popular.
KAYAK users have found double rooms in Europe for as cheap as €6 (Antalya) in the last 3 days. The average price is €185.