May Day in Costa Rica brought together protesters from public workers unions and a wide variety of other groups, including students, sex workers and indigenous people.
Members of 68 public- and private-sector unions will demonstrate Thursday to mark Labor Day along some San José's main streets, the National Association of Public and Private Employees said.
A small group of demonstrators hurled rocks at the Legislative Assembly building, police officers and members of the national media. At least 20 people were arrested.
Laguna Río Cuarto will remain accessible, but the community organization managing the Costa Rica attraction will stop providing visitor services beginning September 28.
