Example of Japan's infinity edge pool

Quick answer：

Infinity edge pools, also known as negative edge pools, are pools designed to give the illusion that the water extends to infinity. In Japan, these pools are often integrated into luxurious resorts and hotels. The design typically features a gently sloping edge where the water appears to merge with the surrounding landscape or horizon, creating a seamless transition. Infinity pools can offer stunning views and a sense of tranquility.