House Of The Rock
While stone houses are today a trendy architectural concept, they originated from somewhere. One of the more fascinating stone buildings is the House Of The Rock, otherwise known as Casa do Penedo. It is a prehistoric monument mostly made of stone. Its foundation was formed with four huge boulder stones and has, over the years, turned into a tourist attraction center.
It was built in the early 1970s and is located in northern Portugal, specifically between Celorico de Basto and Fafe. While it might look like the home of a stone age family, visitors to the town regularly troop in to observe this historic structure.