Adventure travelers who like a little luxury on the side book with Zegrahm for exclusive, small-ship cruises and land-based travel to far-flung destinations. Founded in 1990, the company is known for environmentally and culturally responsible exploration, led by scientists, naturalists, and historians. Clients pay top dollar for off-the-beaten-track visits with remote indigenous populations, photo ops with exotic wildlife, and scuba diving adventures in pristine marine environments. A trekking-and-rafting expedition to Uganda in search of primates, hippos, and Nile crocs is currently a hot trip. Two-week to three- week trips cost between $8,900 and $45,900—prices include transportation, accommodations, meals, and activities.