- The Water Club at Borgata in Atlantic City has three indoor pools
- Views of the Alps make swimming extra-spectacular at the W Verbier in Switzerland
- The natural surroundings of Peru's Sacred Valley inspired Tambo del Inka's indoor pool
(CNN)When it comes to hotel pools, the indoor variety has long played second fiddle to their outdoor -- often rooftop -- counterparts. But these days, striking décor, luxury amenities and stunning settings mean many indoor swimming holes can now challenge even the most glamorous of outdoor pools.