The Marina Bay Sands SkyPark infinity pool in Singapore, viewed from the poolside (top) - demonstrating the 'edgeless' effect - and near the pool's forward edge, showing the structure of the edge used to catch water flowing out of the pool.
An infinity pool, also called infinity edge pool, zero edge pool, overflow pool or spillover pool, is a reflecting pool or swimming pool where the water flows over one or more edges, producing a visual effect of water with no boundary. Such pools are often designed so that the edge appears to merge with a larger body of water such as the ocean, or with the sky, and may overlook locations such as natural landscapes and cityscapes. They are often seen at hotels, resorts, estates, and in other luxurious places.[1][2][3]