Bubbling mineral springs and pools promise maximum relaxation in Rotorua, on New Zealand's North Island. Therapeutic hot mud pools, dramatic geysers and a buried village are within easy reach of the city. What happens in the bubbling mud geysers of "Rotovegas"—the area at the top of Fenton Street—stays in Rotovegas. Once you've made the most of the mud, soar nearly 2,000 feet on the Skyline Gondola for views of Lake Rotorua, then zip back down to explore the lake by paddle steamer, fishing charter or WWII amphibious vehicle.

Wellington boasts a compact downtown area that’s easy to explore on foot and a wealth of architectural styles, from 19th-century wooden cottages to Art Deco masterpieces. Discover the city’s Maori roots at the Museum of Wellington City & Sea and the Museum of New Zealand. Sip coffee and people-watch in lively Courtney Place, or survey the city from scenic Mount Victoria. When the sun goes down on Windy Wellington, take a nocturnal tour of Karori Wildlife Sanctuary to meet some colourful inhabitants.

Staggering beauty and heart-pumping thrills await in the resort town of Queenstown, which is also known for its Hobbits—much of the Lord of the Rings trilogy was filmed in the area. Outdoor enthusiasts flock to Queenstown for the kayaking, bungee jumping, jetboating, white-water rafting, hiking and skiing. More mild-mannered adventurers can take a quiet cruise through nearby Milford Sound, part of the Fjordland National Park World Heritage area, or sample South Island pinot noir from one of the region's 75 wineries.

On Vanua Levu you can pick your pleasure; a rainforest hike, a coconut plantation tour, a relaxing soak in a Savusavu hot spring. Locally run adventure tours will have you river tubing through jungle valleys, mountain biking along sandy trails, and snorkeling the coral sea mount of Split Rock. Jean-Michel Cousteau (son of Jacques) runs an ecologically responsible dive centre that offers courses and packages for divers of all levels of experience.

Lovely, laid-back Melbourne has something for everyone: family fare, local and international art, haute boutiques, multicultural dining, Australian and Aboriginal history, spectator sports, and pulsing, swanky nightlife. Cruise on the free City Circle Tram loop to check out unique attractions like the Royal Botanical Gardens and the Healesville Sanctuary, which buzzes with local animal species.