Phoenix is the capital of Arizona, a territory in the southwest of the United States, and is the fifth-most populated city in the country. It anchors the sprawling, Phoenix metropolitan region commonly known as the Valley of the Sun, which is known for its year-round sun with mild temperatures during the winter. It’s renowned for high-end wellness resorts, golf courses built by Jack Nicklaus, and lively nightclubs. The Desert Botanical Garden, which features cacti and other native plants, is another highlight.