The Elevador de Santa Justa is a 45-metre cast-iron tower wedged between the facades of the Baixa, built to carry people up to the Largo do Carmo. Two wood-panelled cabins with brass fittings do the vertical journey, and the tower is neo-Gothic where it did not need to be: tracery, spiral stairs and iron lace applied to a lift shaft. Raoul Mesnier du Ponsard designed it, and the bridge at the top opened in 1901, the car itself in 1902.
It ran on steam until 1907, when a British firm converted it to electricity. It is often said to be the work of a pupil of Gustave Eiffel; there is no evidence for that, and the resemblance comes from the period and the material rather than from a connection. The walkway at the top gives one of the better views over the Baixa grid to the castle hill, and it can be reached on foot from the Largo do Carmo, at the level of the ruined convent. Above the walkway, a spiral stair inside the ironwork climbs to a smaller terrace on the roof of the tower itself.