Scenery of Niue

Tourists walk by the Avaiki cave, in Niue, on Nov. 2, 2018. Niue, as referred to "the Rock", is one of the biggest coral islands on the planet with dramatic cliffs, interesting caves and chasms that are teeming with marine life. Visitors can enjoy snorkelling, diving, and whale watching trips. (Xinhua/Guo Lei)