My pick
My tip“An hour to two hours; the upper terraces are free; next to the Jardines de Pereda.”
The building by architect Renzo Piano, suspended above Santander bay (2017), with a facade of 280,000 glossy ceramic pieces. World-class art exhibitions, and free terraces and platforms with sea views.
Address
Plaza Emilio Botín, Paseo de Pereda s/n, Santander