Moon Beach, River beach along Rio Negro in Manaus, Brazil.

Praia da Lua is a river beach on the left bank of the Rio Negro, 23 kilometres from Manaus, reached by boat or lancha. Its name comes from its crescent-moon shape. The beach has white sand and dark river water, and the Lonely Planet guide called it the best beach in Manaus.

The beach lies on the left bank of the Rio Negro, 23 kilometres from Manaus, and its name comes from its crescent-moon shape. In 2012 the Advocacia Geral da União found that visitors were being barred from using the beach unless they bought food and drink from the establishments on the shore; a lawsuit was filed against the municipality of Manaus over this and other irregularities found at the city's beaches.

The beach serves as a gathering place where people from Manaus spend weekends with family and friends, enjoying informal meals and music. Visitors can observe how locals use the riverbank as a social space that reflects the region's way of life.

The beach is accessible by boat, with regular services departing from Marina David near the Tropical Hotel and taking about 10 minutes. Weekends tend to be busier and more lively, though visitors can go at any time depending on their preference for crowd levels.

The beach forms a natural crescent shape that gives the white sand a distinctive silhouette against the dark river waters. This geographical feature inspired the location's name and makes it easy to spot from the water.