Isla de Providencia is an island worth discovering. As you fly in to the tiny landing strip from the nearby island of St Andrés, you will have already been enchanted by the Sea of Seven Colours, which ranges from deep green to translucent aqua-blue. A day’s fishing-boat trip will bring you closer to these amazing hues, as you snorkel around Crab Cay or dive after seafood to barbecue for your dinner.