Yerba Buena is the capital of the Yerba Buena Department in the province of Tucumán, Argentina. It is located at an altitude of around 466 metr…Yerba Buena is the capital of the Yerba Buena Department in the province of Tucumán, Argentina. It is located at an altitude of around 466 metres. The city of Yerba Buena is the most urbanized area of the department. It is mostly residential, although commercial activity has increased along its main road with different kind of shops, shopping arcades, restaurants, bars and cafés. The main avenue has is lively, especially on weekends, when yerbabuenenses and people from its neighboring cities gather in search of fun and relaxation.