Isla de Flores Lighthouse

Isla de Flores Lighthouse is a lighthouse located on Isla [de Flores|Flores Island] in the Río de la Plata, not far from Montevideo, Uruguay. Erected in 1828, it is one of the most significant historical landmarks in the region. During colonial times it was used as a slave reception station, later as a sanitorium.
The island is placed between the coast of Montevideo and the dangerous "Banco Inglés" shoal. In the 1800s, the Port of Montevideo desperately needed a lighthouse helping with navigation in hazardous waters; so with the Tratado de la Farola it was agreed that Uruguay ceded to Brazil the territory of the Misiones Orientales in exchange for building this structure. For this reason, the Isla de Flores Lighthouse is known as "the most expensive lighthouse in the world".