Impermeable rock beneath the sand dunes traps water, forming thousands of stunning blue lagoons. We were arriving just as the rainy season was beginning, to capture the habitat coming to life.

From one beach ringed by gorgeous sand dunes to another one tucked deep in the jungle, here are 13 of the top strips of sand in Brazil ... or in a nearby lagoon if the sea is too rough.

Located in the northeastern part of Brazil ... form temporary lagoons in spectacular hues of colours ranging from deep blues to that amazing emerald greens. The dunes in white sand contrast ...