Huge Fish Tank

Okinawa Churaumi Aquarium in Japan.

4 minutes 33 seconds
The main tank called the 'Kuroshio Sea' holds 7,500-cubic meters (1,981,290 gallons) of water and features the world's second largest acrylic glass panel, measuring 8.2 meters by 22.5 meters with a thickness of 60 centimeters.
I like the song that goes with it too.