Up in Cambodia's Cardamom Mountains, you will make a difference when you visit the new Tented Eco camp because every stay preserves the forest by keeping it out of the hands of developers. At the camp, nine safari-style accommodation options offer en-suite bathrooms and patios, while the off-grid camp has a riverside restaurant and is largely powered by solar panels. You and the fam can go on guided day hikes and river trips with local rangers to look for local wildlife and learn about mangrove and rainforest ecosystems and the challenges involved in looking after and sustaining them. Replanting trees, kayaking to help rangers on their patrols or taking part in a variety of other conservation endeavors are also some of the activities offered.