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1.
Has territory on mainland Africa
2.
Used to be part of the Roman Empire
3.
Has a present-day king and queen
4.
Is the birthplace of Christiano Ronaldo
5.
Christopher Columbus lived here at one point in his life
6.
Has one official language
7.
Borders the Mediterranean Sea
8.
Its capital city is on the ocean
9.
Has the higher population density
10.
Was neutral during World War II
11.
Is the second most visited country in the world by tourists
12.
Is the older country of the two
13.
Has the higher GDP per capita of the two
14.
Holds the largest bridge in the world
15.
Is on the Iberian Peninsula
Closest thing I can find is it seems like they have the longest "pedestrian suspension bridge" in the world.