If you are dreaming of an eco-friendly holiday, here's an option that takes you to somewhere you probably haven't considered, Poprad, Slovakia. That's the home of Aquacity, a resort that has photocells built in to the glass walls of the complex. The cells generate enough power to operate their latest pool center, Relax, a solar-powered, geothermal swimming-pool complex . The pool center which opened at the end of June, includes an adult pool center which includes a circular wave pool and four satellite pools equipped with 380 massage jets that is adjacent to a children's water play area. Light effects change the water color and laser light shows create dramatic effects on to a wall of water.

A water park doesn't sound like an eco-frinedly place but the park uses the resources of wind, water and sun, instead of fossil fuels, saving up to 30,000 kg of carbon emissions per day, compared with a similar sized Alpine resort. The resort generates 80% of their electrical requirement and gets their water from geothermal water, drilled from a vast subterranean lake.

The resort has three- and four-star resort hotels, restaurants, bars and a cryotherapy center. In the cryotherapy treatment, you spend time in two chambers, one which is cooled to a temperature of -60°C and the main Cryo-Chamber which is cooled to -120°C. After a few minutes in the chambers you go through a 20 minute low impact, cardio-vascular workout to increase bloodflow. Sounds like one unique vacation.