Pacific Ocean width at about 5°N latitude, where it stretches approximately from Indonesia to the coast of Colombia—halfway around the world, and more than five times the diameter of the Moon. The lowest known point on Earth—the Mariana Trench—lies below sea level. Its average depth is , putting the total water volume at roughly . Due to the effects of plate tectonics, the Pacific Ocean is currently shrinking by roughly per year on three sides, roughly averaging a year. By contrast, the Atlantic Ocean is increasing in size. Along the Pacific Ocean's irregular western margins lie many seas, the largest of which
Seagaia Ocean Dome of the resort. It was reopened in 2016 but closed and demolished in 2017. The Ocean Dome sported a simulated flame-spitting volcano, artificial sand and the world's largest retractable roof, which provided a permanently blue sky even on a rainy day. The air temperature was always held at around and the water at around . The roof of the structure was retractable in four sections. Seagaia Ocean Dome The , was one of the world's largest indoor waterparks, located in Miyazaki, Miyazaki, Japan. The Polynesia-themed Ocean Dome, which was a part of the Sheraton Seagaia Resort, measured 300 metres in