Is the Neapolitan Riviera a town?

No, the Neapolitan Riviera is not a town or a city.

Specifically, it is that part in and around the southern Italian city of Naples that is on the coast. The English word "Neapolitan" means "pertaining or related to Naples." The word "riviera" is an Italian feminine noun that originally referred to that part of coastal Italy bordering the Ligurian Sea. Nowadays, the term is used to refer to any part of Italy that is along the coast.