In season NASA/METI/AIST/Japan Space Systems, and U.S./Japan ASTER Science Team on Wikimedia Commons ↗ Pink Lake Hutt Lagoon — Western Australia
Hutt Lagoon near Port Gregory in Western Australia's mid-coast is the world's largest pink lake by area — 70 square kilometres of beta-carotene-producing Dunaliella salina algae turning the shallow hypersaline lagoon from pale pink to vivid hot pink depending on season, cloud cover, and viewing angle. Unlike Lake Hillier (accessible only by air), Hutt Lagoon is visible from the adjacent coastal highway, and the depth of the pink colour varies through the year — deepest in summer (November–February) when the algal bloom peaks and salinity is highest, palest in winter when rainfall dilutes the brine. The lagoon's industrial salt harvesting (evaporation pans visible from the highway) adds a human dimension that frames the natural colour phenomenon in its economic context — the same algae that create the visual spectacle are harvested commercially for beta-carotene food colouring.
About this spectacle
Standing at the verge of the coastal highway near Port Gregory, visitors look out over 70 square kilometres of shallow brine that shifts from blush rose to electric fuchsia depending on season, light, and angle. The colour comes from trillions of Dunaliella salina algae producing beta-carotene as a survival response to extreme salinity — in summer the water can glow a vivid hot pink that reads almost fluorescent against the pale scrubland horizon. Morning light is the prime time, when low-angle sun saturates the hue and minimises glare off the surface. White salt evaporation pans trace geometric lines across the lagoon, a visual reminder that this phenomenon is simultaneously a working industry. In winter, rain dilutes the brine and the pink fades to a delicate pastel. The smell is sharp and saline. No boat is required — a gravel pullout on the highway offers immediate, unobstructed views. The scale is staggering: the lake stretches far beyond what a single camera frame can contain.
When to go
Jan — Dec, peak Nov — Feb
Getting there
Nearest airport: GER. Nearest city: Geraldton.
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