<human>:  What are the best beaches in the world?
<bot>: The best beaches in the world vary depending on who you ask, but some of the most popular choices include Copacabana Beach in Rio de Janeiro, Brazil, Bondi Beach in Sydney, Australia, and Whitehaven Beach in the Whitsunday Islands, Australia. Other contenders for the title of world's best beach include Boracay in the Philippines, the Maldives, and Hawaii's Waikiki Beach.