Situated at the heart of Barcelona, this nature-inspired cathedral is visited by millions of tourists every year. And with good reason! The Catalan architect Antoni Gaudí started its construction over a century ago, but he unfortunately passed away before finishing it. Many efforts have been made to complete the construction by 2026, so if you've never visited Barcelona before, consider visiting then because it will certainly be a big inauguration!

Photo by Meri Herrero