Sierra, locally known as Las Minas (The Mines), is a district of the Abangares canton, in the Guanacaste province of Costa Rica.

[1][2] It is well known as a historical mining town of Costa Rica, located in the north west Pacific Region.

All over the highlands (San Rafael, Cebadilla, Campos de Oro, Cañitas, La Cruz and Tornos) small producers of coffee and vegetables are organized in cooperatives.

[6] Tourism can include staying in La Sierra and using a non traditional tourist route to Guanacaste, with local options including zip lining, agritourism, visiting the Ecomuseum, seeking out local gold miners, or resting at the hot springs.

It documents and celebrates one of the first mining centers in Central America, and the legends and realities that the miners of the time lived in.

The Eco-museum was developed around the ruins of one of the oldest gold mines in the region, where old machinery, hand tools, and infrastructure can still be seen.

The surrounding area is largely forested and provides opportunities for bird and butterfly watching, and other nature observation.