Prince Albert I was not just a ruler — he was a genuine scientist who went on many voyages into the Atlantic and Mediterranean to study the deep ocean. He collected specimens, invented new equipment for exploring the sea floor, and wrote scientific books. He wanted a building where the world could come and learn about the ocean, so he had this spectacular museum built on the edge of Monaco's cliff, right above the sea itself.
The aquarium on the lowest floor of the museum is one of the oldest and most respected in Europe. It has enormous tanks where you can watch sharks circle slowly overhead, observe sea horses clinging to plants, and see colourful reef fish darting through coral. There is also a touch pool where visitors can gently feel starfish and other sea creatures.
Upstairs, the museum has exhibitions about ocean science — showing how deep the sea really is, what lives in the darkest parts where no sunlight reaches, and why healthy oceans matter for everyone on Earth. The building itself is remarkable: it stands on a cliff 85 metres above the sea, and from the roof terrace you can look straight down at the waves crashing on the rocks below.