Attention adrenaline junkies: next month, veteran travel outfitter Abercrombie & Kent will launch 15 extreme-adventure itineraries around the globe, including dogsledding in Norway and crossing the Sahara by camel (800/554-7016; akextremeadventures.com; 9- to 18-day trips from $4,750 per person, double). “Seasoned travelers are looking to test themselves,” company vice president Peter Boese says. “They’re getting serious about their conditioning.” On one excursion, Masai warriors lead hikers through northern Kenya to spot black rhinos, eland, and Grevy’s zebras. Another takes thrill seekers through a set of spine-tingling activities in Cape Town and Namibia. For example, you’ll fly across the Indian Ocean aboard a World War II Hawker Hunter fighter jet (an experienced pilot shares the cockpit, of course). The luxury level varies for each trip, ranging from plush tented camps with high-thread-count linens to thermal sleeping bags under the stars. “Our goal is to give risk takers something new to write home about,” Boese says. Mission accomplished.