00:00 The Sagrada Familia in Spain, a popular attraction, has been under construction for almost 150 years and is still not finished.

01:27 The Sagrada Familia was originally designed to be a neo-gothic church, but when Antoni Gaudi took over, he completely changed the design to reflect the modernisme style of architecture.

02:43 The Sagrada Familia is a unique Catalan-style church with modern naturalistic elements, 18 large spires representing various religious figures, three completed facades, and a traditional Latin cross layout inside.

03:58 The Sagrada Familia has a unique and colorful interior with stained glass windows and smaller features such as doors representing the seven sacraments and a cryptogram on the exterior wall.

05:14 The letters INRI on most crucifixes stand for Jesus of Nazareth King of the Jews, and if you take the position of each letter in the Roman alphabet, they add up to 48; there is a model of the Sagrada Familia made out of string in the museum at the end of the tour, which is upside down and demonstrates how the spires and arches are naturally occurring through gravity; Gaudi devoted his entire life to the project and when asked why construction was going so slow, he replied, "my client is not in a hurry."

06:27 Construction of the Sagrada Familia began in 1882 and is projected to be completed by 2027, making it longer to build than the Great Pyramid or the Great Wall of China; the church is not technically a cathedral, but was declared a minor basilica in 2010.

07:46 The Sagrada Familia has been funded entirely by private sources, with no contributions from the government or the Catholic Church, and it is estimated that it will take another 6 years to complete.