You can't miss Carlton Gardens, a World Heritage Site, on your next trip to Melbourne, Australia. Although you must travel to the outskirts of the city to visit, it is well worth the trip as these gardens encompass the Royal Exhibition Building and Melbourne Museum. You can enjoy the contrast the gardens provide from the city of Melbourne, as here you can hike, walk, play tennis and cycle. While you hike, cycle, or simply enjoy nature, your kids can attend the Children's Traffic School and learn about safety. Best of all, your visit to the Carlton Gardens boasts free admission.