Sea kayaking among the Greek Isles will recalibrate your definition of relaxation. On the Northwest Passage's eight-day, 80-mile circumnavigation of the islands of Paros and Andiparos, guests average three to six hours of casual paddling a day in clear waters. Rest at sand and pebble beaches (clothing is optional), tour 4,000-year-old Minoan ruins, and sip cocktails on the porches of seaside inns. Pack light: The air and water temps are both 82 degrees. June 6–13; $2,895, plus $80 round-trip for the five-hour ferry ride from Athens to Parakia, the start of the trip; nwpassage.com