Next to the broad, tree-lined Paseo del Prado, the new extension at the world-class Prado museum is an architectural triumph. The well laid-out Botanical Gardens opposite the entrance are worth a wander and behind them lies Madrids green sanctuary, the Retiro park. Boat on the lake, stroll through the fragrant rose garden, and watch the terrapins sunbathe by the delicate Palacio de Cristal.
