Cheap flights from Boston to Donostia / San Sebastián from £269

The Alderdi Eder gardens are one of the most popular spots in San Sebastián. People come here to enjoy the shade of trees on hot sunny days and marvel at the seaside, the Sagrado Corazón statue atop Mount Urgull, the island of Santa Clara. You can also take a ride on an old merry-go-round with Baroque horses. Find the Alderdi Eder gardens next to the San Sebastián Town Hall and the Playa de la Concha beach.

The Aquarium is the iconic place in San Sebastián. It was built at the onset of the 20th century on the western side of the harbour. The Aquarium is one of the most visited tourist attractions. The giant, 1.5 million litre water tank houses over 200 local species, but the bull sharks draw the main attention of visitors. You can see fish close-up when walking through the tunnel. Visit the Aquarium Donostia-San Sebastian at 1, Plaza de Carlos Blasco Imaz.

The pedestrian part of the Plaza del Buen Pastor is a place where you can wander observing the urban architecture of San Sebastián and life in the city. The Buen Pastor Cathedral surrounds the square with its gardens. You can also see other buildings like the Koldo Mitxelena Cultural Centre and the Post Office. The prevailing number of buildings on the Plaza del Buen Pastor are in the neoclassical architectural style and decorated with eclectic details.