Just two hours south of Darwin, this lush 1,500-square-kilometer (580-square-mile) national park makes for a fantastic day trip. It's an untouched wilderness with a host of attractions: tropical waterfalls, abundant wildlife, dense rain forest, spectacular swimming holes and striking rock formations. On your bushwalk, look for some of the hundreds of species of native birds found here, and keep an eye out for the magnetic termite mounds—they look like giant tombstones lined up in a graveyard. (Why the name? Reportedly, the mounds are aligned to the earth's magnetic field.) If swimming under a waterfall has always been your dream, be sure to visit Wangi Falls, one of the park’s best spots for swimming and picnicking.