Adventure
Looking for high-action, low-impact excursions? Gap Adventures (800/708-7761; gapadventures.com) has teamed up with the Discovery Channel for a series of environmental expeditions: the six-day Galápagos cruise deploys Zodiacs and dinghies to explore lava caves and wildlife-filled mangroves.
On an ascent up an active volcano in Santorini, Greece—a new eco-excursion from Costa Cruises (877/882-6782; costacruises.com)—hikers get 360-degree views from the summit’s crater.
Quark Expeditions (866/961-2961; quarkexpeditions.com), meanwhile, has travelers pitching tents in Spitsbergen, Norway, home to 3,000 polar bears, in its Arctic shore option.
