See the underwater waterfall in Mauritius
From the air above Le Morne, the pale lagoon seems to gather itself into a current and pour over the edge of the ocean. The eye reads a waterfall before the mind catches up. What you are seeing is sand and silt moving across the shallow shelf beside much deeper water, and understanding the illusion makes the view more interesting rather than less. The recognisable formation is an aerial experience. A helicopter or seaplane flight circles the south-west peninsula so the pattern, reef and drop-off can be seen together; a hike on Le Morne Brabant can reveal the wider lagoon but only a rough version of the effect. Allow extra margin around the flight because visibility and routing depend on weather and aviation conditions. Book an authorised operator, read the weight, mobility and cancellation terms, and disclose anything relevant to safe boarding. Access arrangements vary between aircraft and landing sites, so no universal provision should be promised. The practical price range covers the sightseeing flight alone, not the wider Mauritius trip, and a ground visit should never be sold as the same view. Count this as complete after seeing the formation clearly from a properly operated flight and taking a moment to distinguish the moving sediment from the apparent plunge. The story here is not an impossible waterfall, but a real landscape producing a remarkably convincing picture.