The mighty fortress walls in the old city of Avila have stood motionless for over 900 years. Not only local residents but also famous Moorish architects were involved in the construction. The work took 9 years, and the result was a high 12-meter wall stretching for 2.5 km. The walls of Avila are the best preserved of their "brothers", and in size they are second only to the Great Wall of China.

In the summer of 1221, by order of Ferdinand III, construction began on a cathedral in Burgos, which was to become the main temple of the Kingdom of Castile. Construction of the Burgos Cathedral was completed in 1567, having lasted almost 350 years. Burgos Cathedral is considered one of the most beautiful Gothic churches in the world.

Alcazars are fortresses and palaces in Portugal and Spain, and the word literally translates from Arabic as "fortress". Such structures appeared with the arrival of the Moors to the territory of Spain in the 8th century. The Alcazar in Segovia dates back a century later, but the first mentions of it appeared only in 1120, so one can only guess what the fortress looked like before.

It was built about 2,000 years ago and served its purpose until the 19th century, providing water to Segovia and nearby settlements. Although the aqueduct is 18 km long, only a small section passing through the Azoguejo square is popular with tourists. Due to its active use, the aqueduct in Segovia was often repaired, and therefore retained its almost original appearance, except for the stonework that has been replaced in places.