The $140,000-per-night luxury submarine [video]

For Valentine’s Day 2014, promises a service that leaves couples able to 'relax, unwind and enjoy the secluded isolation that the ocean puts between them and the rest of the world' - 200m below the waves.

Staffed by an on-board crew the vessels can be moored at a location chosen by the customer, whether that be a stunning coral reef off the coast of St. Lucia or a sunken battleship in the Red Sea, say the travel company.

With private speedboat transfers as standard, the service can also be customised with optional extras including more rooms on board, helicopter transfers with a beach landing, a petal-scattering service or a champagne breakfast in bed.

To complete the luxury experience, a specialist aphrodisiac tasting menu has been developed to ensure that guests are in the mood to make full use of the Lovers Deep facilities, which could also include a two-person shower at the customer’s request.

Featured dishes include oysters, caviar and a decadent chocolate fondant with essence of pomegranate. Oliver Bell, co-founder of Oliver’s Travels, who curated the new experience, said: 'All of our handpicked, luxury properties have something unique and quirky about them, but Lovers Deep really stands out as one of our quirkiest yet.