The Blue Hole

The Blue Hole

Introduction

The Blue Hole is located at the northeastern tip of Saipan Island. It is a natural cave connected to the Pacific Ocean and has been ranked as the world’s second-best cave diving site by Scuba Diving magazine. From the outside, the Blue Hole resembles a dolphin with its mouth open, while inside lies a massive stalactite cave formed through the natural erosion caused by seawater. Due to the shadows cast by the rocks attracting a greater variety of underwater life, the sea floor here is even more vibrant and colorful than the land above—featuring an array of tropical fish in dazzling hues, turtles, manta rays, dolphins, jellyfish, sea urchins... The underwater world is more spectacular than that on land. Inside the Blue Hole, there are two natural swimming areas connected to the outer ocean via underwater passages. For experienced deep-sea divers, this offers an unparalleled experience. Affected by tidal movements, the water inside the cave can be completely calm at times or wildly turbulent at others, so swimming and diving here require extra caution. Additionally, the concrete steps leading down to the Blue Hole are steep and slippery, so it’s best to walk slowly.

Saipan Island, Tinian & Saipan