The zip lines of Arenal, Costa Rica are reportedly thrilling, the hanging bridges make for an enjoyable jungle walk, and the lesser-known hot springs are very relaxing. But finding tranquil and unspoiled nature in this touristy area requires some effort. There is no shortage of high-end resorts, but as we discovered, few are truly recommendable. My favorite was the plush Nayara Hotel, Spa & Gardens, and many others agree, judging by the difficulty we had in securing a reservation. There’s no need to worry about roughing it in this luxurious retreat.