Swiss architects Jacques Herzog and Pierre de Meuron, who transformed a former London power station into that city's Tate Modern, performed a similar feat here. Their conversion of this early-20th-century power station has created a stunning arts complex fit to become the fourth point in Madrid's former triangle of great art institutions—the Prado, the Reina Sofía, and the Thyssen-Bornemisza museums. Belonging to one of the country's wealthiest foundations (La Caixa), the structure seems to float on a newly created, sloped public plaza, with a tall vertical garden designed by French botanist Patrick Blanc on its northern side contrasting with a geometric rust-color roof. Inside, the huge exhibition halls display ancient as well as contemporary art, including a sample of La Caixa's own collection. The restaurant on the fourth floor has good views.