Environmentally-savvy travelers are increasingly making their vacation and travel choices based on a desire to feel both relaxed and feel like they're doing good for the world around them. Whether you're a small inn, an eco-friendly ranch, or even a large hotel, a natural swimming pool can help you draw in those environmentally-conscious travelers. Here's why. 1. No Chemicals. Because natural swimming pools operate like a pond, you don't need to fill them with harsh chemicals that can irritate skin and eyes as well as dumping waste into the local water system.