Although dramatically advanced in their state of ruin, some of the ancient tombs and the 16th-century fortress remain their fine original decoration, and they spread a most impressive atmosphere. Best climb up at dusk for enjoying a dramatic and breathtaking view over Fès but keep in mind to head back early as the path is not featured with light.

The Basilica de Santa Maria del Mar is one of Barcelona’s most stunning churches and a prime example of Catalan Gothic architecture. Its design showcases a cleaner, more restrained style compared to the elaborate ornamentation typically associated with Gothic structures. Construction began in 1329 and was completed in 1383 — an impressive feat for such a monumental project. Inside, the basilica feels remarkably spacious and airy, with its three naves of equal height supported by towering, slender pillars. The sparse decoration of the chapels enhances this sense of openness. Natural light filters through the magnificent rose window on the main façade and the vibrant stained glass windows, bathing the interior in a serene glow.

Reportedly the world's oldest library, first established in Fes over an entire millennium ago (9th century), the Al-Qarawiyyin Library recently opened its doors to the public once again following a restoration effort. The library still belongs to Qarawiyyin University, the oldest continuously operating university on Earth.

While it might seem a bit macabre to include a cemetery into your travel schedule, the history of this one is magnificent and the cemetery itself well worth the visit. It is the largest in Latin America and dates back to 1821. If you want to learn more about this resting place, named one the World's Most Scenic Cemetries by the CNN, you should join one of the two hour night tours that will take you through the entire cemetery. You have to be at least 18 years old to join.