Buenos Aires bears the mark of a single great landscape architect: Carlos Thays. Born in Paris, Thays arrived in Argentina in 1889 and went on to lay out many of its plazas, woods, and estancias. The best examples of his work are the Botanical Gardens (3951 Avda. Santa Fe; 54-11/4831-4527), which displays 3,500 species of flora, and the Parque Tres de Febrero (Avda. Adolfo Berro; 54-11/ 4800-1135), filled with towering tipa, ceiba, and jacaranda, as well as a garden of 12,000 roses.