Tetiaroa is a private island in French Polynesia located in the South Pacific Ocean. It is not considered a city, but rather a luxury resort destination. The island is famous for its stunning natural beauty with white sandy beaches, turquoise waters, and lush greenery. It was once purchased by actor Marlon Brando in the 1960s, and it is now home to The Brando, an eco-friendly resort that offers luxury accommodations and various activities for guests.