Hey, bucket list: prepare to get shorter, because this six-day trip through Costa Rica’s interior is jam packed with once-in-a-lifetime experiences. Staying in amazing hostels as you go, you’ll kick things off by catching views of the Poás Volcano’s massive crater en route to the outdoor adventure capital of La Fortuna. Hop on a boat and cruise across Lake Arenal on the way to Monteverde for some zip-lining above the cloud forest and whatever other optional activities get your adventure senses tingling.