Maresme´s cultural heritage stretches across all eras, and includes prehistoric remains, such as the Roca d'en Toni in the Serralada Litoral park, and many Roman sites (Can Ferrarons in Premià de Mar, the Pineda de Mar aqueduct, etc.). Its most important religious sites include the church of Santa Maria de Mataró, dating back to the 18th century; Sant Cristòfor, in Premià de Mar, with its entrance porch decorated with seafaring motifs; the Romanesque chapel of Mare de Déu del Viver, in Argentona, and the Baroque altarpiece in the church of Santa Maria in Arenys de Mar.The modernist architects also left their mark, as can be seen from following the routes that take in the work of Puig i Cadafalch and Lluís Domènech i Montaner in Canet de Mar, Mataró and Argentona.
The Garraf region can boast two towns that attract large numbers of tourists: Sitges and Vilanova i la Geltrú. Sitges has been a favourite destination for cultural and cosmopolitan tourism since Santiago Rusiñol first chose it as a meeting place for Modernist artists, and built his house and workshop, the Cau Ferrat. The fortunes made by the "indianos" (prosperous Catalans returning from the Americas) filled the town with the finest examples of 20th century architecture (Villa Avelina, Casa del Rellotge). Other interesting sites in the town include the Maricel group of buildings, the Terramar gardens, the Vidal i Quadras bastion and the church of Sant Bartomeu i Santa Tecla, symbol of the town.
Every autumn, Sitges hosts the International Film Festival of Catalonia, the country´s main film event. Sea and culture are also the main attractions in Vilanova i la Geltrú. It has one of the main Catalan fishing ports, a lighthouse housing the Museu del Mar (museum of the sea) and a seafront promenade packed with recreational facilities and some excellent architecture (Torre de Ribes Roges, Ca l'Alsina). The Víctor Balaguer Library and Museum commemorates this writer and politician and houses his art collection. The Baix Llobregat region preserves remains of ancient settlements, such as the prehistoric mines of Gavà and the Roman thermal baths at Sant Boi.
The original Antoni Gaudí crypt in the Colònia Güell (Santa Coloma de Cervelló) is the most important modernist site, next to the Josep Maria Jujol buildings in Sant Joan Despí. The region has a rich industrial heritage, exemplified by sites such as the Pujol i Bausis ceramics factory in Esplugues de Llobregat, the Colònia Sedó in Esparreguera and the Museu Agbar de l'Aigua, in Cornellà de Llobregat.The two largest towns in the Alt Penedès draw together the region´s most remarkable heritage sites.
The Gothic style is the most typically found in Vilafranca del Penedès, with buildings such as the basilica of Santa Maria (which houses a group of sculptures by Josep Llimona), the old Palau Reial (now home to the Museu del Vi, the wine museum) and the Palau Baltà.The Gothic style is also in evidence in Sant Sadurní d'Anoia (the rectory and the church bell tower), although the most striking example of modernism can be seen on the façade of the Casa de la Vila (town hall), the Casa Berger and the cellars ("cavas") of Codorníu (the work of Puig i Cadafalch) and Freixenet.