East Africa
OUTFITTED
Ethiopia is hot. Actually, it's mild and dry, but it is experiencing a major tourism uptick. Take Ethiopian Airlines' (ethiopianairlines.com) new $1,000 Washington, D.C.–Addis Ababa flight in time for Abercrombie and Kent's 12-day Ethiopia: An Ancient Dynasty trip. The jeep-and-walking tour explores the source of the Blue Nile and ancient ruins of the kingdom of the Queen of Sheba. April 1–12, $3,000 all-inclusive; abercrombiekent.com

Taking to the Trees
THE LOOKOUT
The treehouse concept, long synonymous with eco-resort kitsch, gets an update this month with the launch of the Ewok-style Finca Bellavista subdivision, in Costa Rica. The 250-acre expanse—a mile from Rio Piedras National Park—straddles two rivers, contains more than 100 waterfalls and swimming holes, and overlooks the Pacific Ocean, with Pavones, the world's longest left-breaking surf wave, about an hour away. All houses will be sustainable, off the ground, and off the grid. Two-acre plots from $50,000; fincabellavista.net