Details: Thrill seekers rejoice. In March 2014, Crystal Cruises will be taking passengers aboard Crystal Serenity on a 21-night adventure through some of the world's most fascinating temples and safaris. The cruise will begin in Singapore and end in Cape Town, making stops in Thailand, Cambodia, Indonesia, Mauritius and South Africa along the way. Award-winning broadcast journalist Ken Rees and a number of special interest lecturers and enrichment instructors will be onboard, while available guided tours and shore excursions -- including a scenic Catamaran Sail & River Bank Lunch in Mauritius and endangered species tracking throughout South Africa -- can be enjoyed off the ship. Fares start at $8,220 for an oceanview cabin, although book-now discounts are currently available.