The reactions of nitrous acid with 1Â°- and 2Â°- aliphatic amines may be explained by considering their behavior with the nitrosonium cation, NO(+) , an electrophilic species present in acidic nitrous acid solutions.
Main article: Indoor water park. The first-ever indoor water park was built in Edmonton, Alberta, Canada, in 1985 at the West Edmonton Mall as part of the $1.2-billion-dollar Phase III expansion. World Waterpark is still the world's largest indoor water park, at over 817,800 sq ft (75,980 m 2) in size.
1 How Busy Are the Water Parks at Disney World in July?  According to Frommer's guidebook on the USA, as of 2013, Noah's Ark water park (noahsarkwaterpark.com) -- with a footprint of 70 acres -- is the largest water park in the United States.