The 240m euro (£199.6m, UD$321m) M/S Viking Grace cruise ship has taken its maiden journey on the Turku-Stockholm route, between Sweden and Finland.

The 218m-long vessel is the first large passenger ship to be fuelled using liquefied natural gas (LNG) - an eco-friendly cryogenic fuel.

Onboard facilities include a Spa and Wellness department with two large spa pools, Finnish saunas as well as steam saunas and a herbal sauna.

Guests can cool off in the spa snow cave, where snow is falling and the temperature is -2C.

There will also be two private VIP treatment units for up to six people, each with its own sauna and spa pool.

The spa has partnered with Italian company Comfort Zone who will provide ecological products that will be used during treatments.

Ten treatment options are on offer ranging from 15-minute manicures and pedicures to 90-minute full body treatments. The menu will also feature a wide range of nourishing facial treatments.

The 2,800-passenger vessel, which was designed by DSign Vertto Kivi and built at the STX Finland shipyard, houses seven restaurants and bars with a total capacity of 2,000 passengers.

There are four cabin suite categories; flow, organic, romantic, and high-tech. Each suite has individual features with some housing private spa pools and saunas.

Dining options on offer include Scandinavian restaurant Oscar as well as Aurora serving international cuisine.

Other facilities available are a Seamore champagne and wine bar and a Sweet & Salty café.