Singular/plural

[Rustamsher]

Hello Alan,

What contributes to the luxurious experience that makes the guests want to come again and again are the amazing swimming pools (yes, in plural). One is meant for fun activities and adventure, and the other for relaxation and spending some peaceful time, surrounded by 85 hectares of wonderful landscape.

Shouldn't it be "is" in lieu of "are" from grammatical point of view or either is identical?

Thanks.

[Alan]

In contemporary AmE usage plural complements to a copula are generally treated as deferred subjects and the verb is accordingly governed in the plural. Traditionally, however, 'is' would be correct in this sentence-position.