Monica Galetti and Giles Coren visit Jade Mountain, a hand-built hotel in St Lucia where each room has no outer wall and so is open to the ocean view - as well as having its own private infinity pool. Giles finds that room service here is tougher than it seems, and Monica dives for lionfish, which they both serve to guests visiting especially to have their wedding on the beach.

• Monica Galetti
• Robert Rinder