Kusu Island means Tortoise Island in Chinese and is a Sacred site where many people visit the island to worship the sacred sites, such as the annual Kusu Pilgrimage season during the 9th lunar month, generally among September and November.

There are religious sites such as At Da Bo Gong Temple and 3 Malay saints, or 'keramat', where people will come and pray.

There are swimming lagoons and seashores for the adventurous ones, and visitors can even Snorkel and spot live marine animals and aquatic plants.