Houses Henry’s House. Spacious country house in front of Lake Arenal. Villas Volcan. Unique river front property and easy to access location. Firefly Retreat. Luxury & Private Home with Volcano and Lake view. Cozy & Private House with Volcano View and Gardens. Beautiful 4 bedroom house located in the center of El Castillo. 2 bedroom/ 1 bathroom house in the quiet Barrio El Millon, 1km south of El Castillo.