Image via WikipediaBasilique du Sacré-Cœur is "The basilisk of the holy heart". Placed on the highest hill in Paris it becomes a significant monument. When you arrive at the city from the north, you can't avoid noticing the beautiful white building sitting like a crown on top of the hill.
Unlike so many other beautiful religious buildings in Paris, the Sacré-Cœur isn't very old. The construction started in 1875, but over the years people disagreed about the project and the work stopped for several years. It was finally completed in 1914, but wasn't opened before 1919 after World War I.
The building is brightly white and doesn't discolour to the same degree as the typical limestone buildings in Paris. This is because it's made of travertine which is more resilient against the weather. The basilisk is a beautiful sight as it brightens up the skyline of Paris. As it's a functioning church, it's free to enter and see the wonder from the inside as well. Just remember to show respect for the praying.
From the basilisk there's an amazing view over most of Paris. It's completely free and you avoid the long queues at the Eiffel-tower, just be aware of pickpockets and street sellers as they are numerous. The panorama is stunning and captivates your gaze over and over, both day and night. The view certainly makes up for the many stairs you need to climb to get there. And if you're lazy or tired, there's a small cabin which runs up the hill for a small fee.