It had to be Notre-Dame at number one. Among the most iconic landmarks in Europe, there has probably never been a better time to visit the cathedral. After a terrible fire almost destroyed it in 2019, Notre-Dame has undergone a miraculous five-year restoration that has returned it to its former glory and then some.

Its walls and columns cleaned, its side chapels repainted and its stained-glass windows back in place, the cathedral is currently as close to its original appearance as it's ever likely to be. And, fortunately, it's still free, though it's wise to book tickets in advance to avoid the queues.

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