Another great option for a rainy afternoon in Plaza de España Barcelona is to visit the CaixaForum. This cultural center, housed in a former textile factory, offers a diverse range of exhibitions, including contemporary art, photography, and multimedia installations. You can explore the different galleries, attend a lecture or workshop, or simply wander through the unique architecture of the building. The CaixaForum also features a café and a bookstore, where you can relax and immerse yourself in the world of art and culture while staying dry from the rain outside.