Pool or Aquarium? Transparent Walls Entertain Swimmers and Onlookers Alike. By REBECCA BRATBURD Aug. 21, 2023 11:06 am ET Order Reprints Print Article ...

A development in London is preparing to open the world's largest freestanding acrylic pool structure -- a transparent-bottom pool suspended 115 feet over the ground.

The Sky Pool’s see-through structure allows swimmers to gaze at the ground 115 feet below. REUTERS Needless to say, observers seemed hesitant about taking a dip in this sky-high swimming hole.