According to forum posts, San Sebastian and Bilbao are must-visit cities in the Basque Country. San Sebastian is famed for its beautiful beaches like La Concha and Ondarreta, and its vibrant old town rich in pintxo bars. Bilbao is celebrated for its modern art at the Guggenheim Museum and its historic old quarter.

Some travelers have highlighted the natural beauty and hiking opportunities in the region. The Urkiola Natural Park and the Gorbea Natural Park provide scenic hiking trails and are easily accessible for those looking to explore the Basque Country’s lush landscapes.

Travelers have called out specific historical sites such as the Gaztelugatxe, an islet connected to the mainland by a man-made bridge, and Gernika, famous for its historical significance and the Casa de Juntas parliament building.

For coastal exploration, users recommend towns like Getaria and Lekeitio. These spots offer a combination of beautiful beaches, historical sites, and excellent gastronomy, typical of the Basque seaside towns.

According to forum posts, San Sebastian is renowned for its beautiful beaches, with La Concha Beach being highlighted as possibly the most beautiful beach in Spain. The continuation of La Concha, Ondarreta Beach, is also noted for its beauty.

Travelers have called out several cultural and historical sites in San Sebastian. The Old Town, located behind the Ayuntamiento Building, is famous for its pintxo restaurants. The San Telmo Museum, the main art museum in the city, and the Cathedral of the Good Shepherd, a stunning downtown church, are also must-visit locations.

The Miramar Palace, known for its beautiful gardens and historical significance, and the Monte Igueldo, from where one can get panoramic views of the city, are also highly recommended by visitors. The Peine del Viento Sculpture, located at one end of Ondarreta Beach, is another unique attraction that captures the artistic vibe of the city.

According to forum posts, several bus companies including ALSA, PESA, and Lurraldebus operate frequent services from Bilbao to San Sebastian. Buses depart from the Intermodal station and from Bilbao airport, offering multiple departures per hour.

Travelers have mentioned that there is also a train option available for traveling between Bilbao and San Sebastian. However, this service is noted for being slower than the bus due to its numerous stops.

The journey by bus takes approximately 75 minutes and costs around 12.9 EUR as per the information shared by forum users. This makes the bus a preferred option for its efficiency and cost-effectiveness compared to the train.