Located in the Tierra de Campos region, this town is emblematic of the Camino de Santiago and has an important medieval legacy. In 1066, the Monastery of San Martín was founded, of which its famous Romanesque church remains, reconstructed between 1895 and 1901 by Manuel Aníbal Álvarez. At the end of the 18th century, the works of the Canal de Castilla reached the town, highlighting the quadruple lock and the tourist boat dock of Juan de Homar, an attraction for pilgrims, as it is the only navigable section of the French Way.
Within the urban area, besides the Church of San Martín de Tours, the Gothic Church of San Pedro stands out and houses the Museum of Sacred Art, as well as the Church of Santa María del Castillo. Outside the urban area, the Hermitage of Santiago or del Otero features a Romanesque sculpture of the Virgin of Otero.