2 Best Sights in The Osa Peninsula and the South Pacific, Costa Rica

This private nature reserve staffed by volunteers and a senior biologist has an easy trail to a waterfall, plus almost 12 km (8 miles) of river and ridge trails, including one trail that utilizes 4 km (2½ miles) of the Chirripó National Park trail. It's a pleasant alternative for hikers who aren't up to the challenge of Chirripó or haven't reserved a spot far in advance. You can take a guided 3½-hour tour past two waterfalls and learn about the flora and fauna of the cloud forest for $35. There's also an art gallery featuring nature paintings by artist Linda Moskalyk, and accommodations in four fully equipped houses (starting at $70, two-night minimum). Volunteers often occupy the simple rental cabins, so check the website for availability. There's no admission fee to hike in the reserve, but donations are requested.

You'll find excellent bird-watching and hiking in this nature preserve, uphill from the Costanera. Family-run, the property has well-groomed trails through a majestic, primary forest reserve. Early-morning, three-hour birding tours start at 6 ($40 per person, two person minimum) and end with a hearty home-cooked breakfast. In the afternoon, you can set out for a three-hour birding walk. For a totally different perspective on wildlife, join the naturalist-guided night tour, from 6 to 9 pm. The best way to book is through the Uvita Information Center.