When strolling around the beautiful Retiro Park in Madrid, take the opportunity to visit “Palacio de Cristal”. The iron and glass building used to be a greenhouse, with tropical plants coming from the Spanish colonies, notably the Philippines. Nowadays, it is used mainly for exhibitions curated by the renowned Reina Sofia Museum, so check the program beforehand. Whilst there, take a few moments to admire the lovely lake and fountain right in front of the palace, as well as the Alfonso monument and walk around other areas of Madrid’s cherished park.