World's Tallest Indoor Waterfall Opened at Changi Airport

The world's tallest indoor waterfall, 131-foot-tall, opened for the general public at Singapore's Changi Airport.

Details:

• The waterfall is housed inside a dome-shaped complex which has gardens growing over four storeys, more than 280 retail and food outlets, a hotel and a movie theatre.
• The structure also has a botanical garden with 120 species of plants.

Question:

Q. Where has the world's tallest indoor waterfall, 131-foot-tall, opened for the general public?
a. Miami Airport, Florida, U.S
b. Changi Airport, Singapore
c. Heathrow Airport, London, England
d. Haneda Airport, Tokyo, Japan