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.
Located in Krausnick, Germany, the Tropical Islands Resort is the largest indoor water park in the world. The water park is inside a 107 meter (351 ft) high hangar that stands as the worldâs largest single hall without supporting pillars inside.