A
series of extraordinary houses by Montaner, Gaudí and
Puig i Cadafalch comprise the Mançana de la Discòrdia
(Block of Discord) on the Passeig de Grácia between Aragó
and Consell de Cent. Information and passes for the Ruta Modernista
can be obtained from the first floor of Casa Lléo Morera
at number 35. Gaudí's Casa Batlló at number
43 looks rather like an underwater grotto, with blue-green tiles
on the façade, frog-faced balconies and a reptilian roof.
Ruta Modernista pass-holders are permitted into the main apartment.