• Brief description: Guggenheim is a museum of contemporary art designed by the Canadian architect Frank O. Gehry. Since its inauguration in 1997, the museum has received more than a million visitors per year and has had an extraordinary impact on the Basque economy and society, boosting tourism in the region and promoting the renovation of numerous public and private spaces in the city. The building is a work of art in itself, even more impressive than the art contained within it (which is often criticized for being abstract and modernist). Its curvilinear and twisted forms, covered in limestone, glass curtains and titanium sheets, produce a powerful effect. If you look closely, you'll be able to see how it represents the fusion of forms of ships, blast furnaces and metallurgic materials, the big industries along the river in the past. It's worth viewing the building from different angles to observe a variety of perspectives (we recommend going up to Salve Bridge - the one with a red arch - and even crossing to the other side to see it from the front; return on the Duesto Library footbridge). We also recommend visiting the museum itself, as the interior is also breathtaking. Be sure not to miss the pieces Mamá de Louise Bourgeois (the giant spider between the Guggenheim and the river) and Puppy, the giant dog made of flowers guarding the main entrance to the museum at Avenida Abandoibarra. 
• Cost: Prices vary depending on the exhibition, though usually it's around 11€, audio guide included.
• Hours: Tuesday to Sunday, 10:00 to 20:00. During July and August it's open every day. Ticket office closes 30 minutes earlier. 
• Length of visit: 2 hrs inside, 1hr walking around the museum, which includes crossing the river for the views.
• How to get there: Walking or by tram (Guggenheim stop). The closest metro stop is Moyua.