The Blue Mountains are named for the delicate azure haze that lingers along the region, which is actually a fine cloud of oil emitted by eucalyptus trees. The mystical mountains are a labyrinth of plateaus, gorges and gum trees. Check out the Katoomba Scenic Railway (the steepest railway in the world), the Jenolan Caves and the Giant Staircase nature walk.

Sun-drenched and built for fun, Australia's Gold Coast hugs Queensland's southeast coastline with beaches, shimmering high rises, and epic surf breaks. Though it's hedonistic at heart, there's also plenty of opportunities for adventure and family-friendly attractions beyond its well-known party scene.