The hotel is a lovely wooden building partially built on stilts overlooking the river. We had two one night stays here either side of a two night trip to Base camp Bartoli and stayed in both upstairs bedrooms which had a balcony and seating overlooking the river.The hotel is owned an managed by Marga and her husband, they have three delightful children. Marga is an absolute angel, not only did she look after us brilliantly during our stay, but also arranged and confirmed our 2 night stay stay at Bartoli Base Camp and also our subsequent Los Guatuzos 3 night stay. She also assisted us greatly by arranging for the captain of a fast boat travelling to San Carlos at 6am on the day of our departure to take us as passengers, providing us with our own private riverboat transfer, they took us direct to the quay from where the Los Guatuzos boat departs.During our stay at the hotel, Marga looked after us brilliantly. On the night of our arrival it was raining too heavily to go outdoors, but she has arrangements with local restaurants which bring food to the hotel and we had a delightful fish dinner at Luna Del Ray overlooking the water.The rooms themselves while small are efficiently arranged and very tastefully decorated providing a very comfortable stay. Views from the balcony are teriffic. Breakfast was excellent and we even had a great takeaway breakfast for an early morning start on our final day.Thank you Marga for everything, we are truly grateful for all your help and assistance, we loved our stay in El Castillo and your wonderful Hotel Luna del Rio.