It has, as of Monday, a total of 106,508 reviews from users who have visited it and later shared their experience with the rest of the TripAdvisor community.
The Eiffel Tower in Paris and New York’s Central Park follow closely behind the Basilica de la Sagrada Familia, with 98,909 and 94,437 reviews respectively.
The rest of the top 10 is made up of Rome's Colosseum, Paris's Musee du Louvre, the Bellagio Fountains in Las Vegas, The National 9/11 Memorial and Museum in New York, Rome's Trevi Fountain, the Top of the Rock Observation Deck in New York and the London Eye.
In 2015 it was announced that the Sagrada was entering its final construction phase with the six towers set to be raised, making it Europe's tallest building.
Chief architect Jordi Fauli said the central 'Tower of Jesus Christ', the tallest of the six, will make the architectural marvel that draws millions of visitors each year one for the record books when it is finished in a little over a decade.
'The central tower of 172.5 meters (566 feet) will make it the tallest cathedral in Europe, because the tallest tower in Europe is Ulm, at 162 meters (531.5 feet),' Fauli said.
The cathedral was designed by visionary architect Antoni Gaudi, and once the works are complete it will surpass Germany's Ulm Minster as the tallest of its kind in Europe.
St. Peter's Basilica in Rome will still have the tallest interior.
The first stone was laid on March 19, 1882, following the Neo-gothic design drawn up by the architect Francisco de Paula del Villar y Lozano, the first architect of the 'Sagrada Familia'.
Gaudi took over the design of the Sagrada Familia in 1883 until his death on June 10, 1926, due to a traffic accident.
The main projects being undertaken over the coming years are the construction of the west sacristy, the central towers and the Tower of Jesus, which will eventually be crowned with a cross 170 metres above the ground level.
According to 'La Sagrada Familia' Foundation, the temple could be finished in the first third of the 21st century. More than three million people visit the temple each year.
Fauli said the plan to have the towers and most of the church's structure completed in 2026 for the 100th anniversary of Gaudi's death is still on schedule. He said there will still be some elements left to finish, such as decorations.
'It's difficult to predict but we can say that it will be completed by 2030, 2032,' he said.
According to dailymail.co.uk