Rio Celeste and Los Teñideros in Costa Rica is famous for its stunning turquoise river and lush rainforest. Accessibility can be challenging with some steep and potentially slippery trails, so appropriate footwear is a must. Solo visits are possible for experienced hikers, but guided tours are recommended for enhanced safety and insights into the area's ecology. The dry season (December to April) offers the best conditions for hiking and clear river views, while the rainy season (May to November) may result in muddier trails and less vibrant water color. Entrance fees to the Tenorio Volcano National Park are approximately $12-$15 USD per person. A typical visit lasts around 3-5 hours, allowing time to hike to the waterfall, explore the viewpoints, and admire the unique river features.