Despite its relatively small scale, this is a world-class attraction. It is the best-preserved Roman temple anywhere. Built in 19 B.C. by Roman emperor Marcus Vipsanius Agrippa, the original patron of the Pantheon in Rome.

More than just a bookstore, Livraria Lello is a historical and architectural masterpiece in downtown Porto. Opened in 1906, Livraria Lello & Irmão as it is also known combines elements of Neo-Gothic, Art Deco, and Art Nouveau styles that comprise intricate woodwork, a large stained glass window bearing the bookshop monogram with the motto "Decus in labore" (dignity at work, in Latin), and a remarkable red spiral staircase, which starts as one set of stairs and splits into two that join in a circular design. The latter is a huge attraction here since it resembles the Grand Staircase from the Harry Potter films, and considering J.K. Rowling was once a Porto resident, there is a high chance this place might have inspired her. Livraria Lello became so popular with tourists that in July 2015 the store started charging a 5 Euro entrance fee and queues can take over an hour. You can purchase tickets on their website.

If motorcycles fascinate you, the Ducati Museum, on the outskirts of Bologna, is a must. At the Ducati Factory, you can see the history of this world-famous brand from the year of 1926 until today. You can also join the factory tour, just make sure to book in advance.

The Cathedral of Saint Mary was built in 1394 and it is Murcia's most important monument. It has outstanding details, both inside and outside, with elements of Gothic, Renaissance and Baroque architecture. The bell tower is 90 meters tall and it has 24 bells, each individually named.