They skipped the mud baths, but they did not skip lunch. This is a photo of the restaurant where they ate at the Hacienda Guachipelin, which is a working cattle ranch that has rooms for guests to stay, as well as a restaurant and tourist activities. Its website is www.guachipelin.com. It is an ideal place for exploring Rincon de la Vieja, which is located very close to Guachipelin.
This photo reflects the excellent tourist infrastructure in Costa Rica. It makes it a much more pleasant day when tourists can hike, horseback ride, see volcanic activity and wildlife, and do all of the other activities in a spectacular ecosystem such as Rincon de la Vieja, yet tourists can still have lunch in a quality restaurant and pleasant surroundings.
In many developing countries, there would not be the hotels and restaurants to support tourists (except backpackers). In Costa Rica, eco-tourism is the country's number one industry, and there is a national priority on developing and improving the facilities for tourism. In fact, Costa Rica is about to build an entirely new airport terminal at Liberia, the international airport that brings foreign tourists directly to the northwest Pacific province of Guanacaste.
One thing stikes me as curious about today's photo of Hacienda Guachipelin restaurant, however. As you can see from the photo, it is open air, as are most of the restaurants in Costa Rica. It has large windows to look out at the jungle. It also has a stained glass window hanging in one of the window spaces, with a tropical scene displayed in stained glass. I like stained glass, but it seems funny to to me to have a stained glass jungle scene hanging in a window when you could see a real jungle scene out the same window. That is just my opinion, which of course you may not share.