Never heard of it? It happens to be the hometown of French president Emmanuel Macron and his wife Brigitte but is also known for archaeological finds dating to the Paleolithic Period (and quite a history in between!) I think 99% of tourists never bother to go to this charming city and it's such a shame to miss it if you're traveling in northern France. It is halfway between Paris and Lille (about 1-1/2 hours from Paris by train) and is home to the largest cathedral in France - and IMO, the most beautiful one as well. Yes, it is even bigger and more beautiful than Notre Dame in Paris! And it sits like a jewel right in the center of the city where you can just wander in and enjoy the hushed silence in this beautiful place. No tickets, no lines, no crowds.
There is a canal system running through the city called les hortillonnages on which little farms and gardens "float" and you can take a leisurely boat trip among them. There is an historic house museum in the home of Jules Verne and an art museum which could reasonably be described as a "mini-Louvre." In the Musée de Picardie are paintings, sculptures, antiquities and archeological treasures in a much more accessible venue than its massive counterpart in Paris. Also, no lines, no crowds, just walk up and buy a ticket.
There is a small but vibrant night life in the Quartier Saint-Leu which is right on the river and lined with charming restaurants, bars, and brightly colored little houses. (Thanks to the large university, UPJV, there is a distinctly youthful vibe to the city. It isn't by any means a provincial backwater.)
If you're in France in the winter, Amiens is a charming Christmas village - it has the largest Marché de Noël in northern France, a ferris wheel, and best of all an illuminated spectacle at the Cathedral which is not to be missed.
What you WON'T find in Amiens are a lot of tourists. It is a city that tourists just seem to swirl around and keep on going for whatever reason. Because tourists are few and far between, this is a city where you very quickly get a sense of the local color (for good AND for bad, since the residents are not known for their friendliness, I'm sorry to say.)
However, this is a very easy city to visit, one of the easiest in France that I've been to. The train station is just steps from the city center and maybe a 10 minute walk to the Cathedral. Everything you'd want to see is easily walkable. There are hotels just steps from the the train station as well, Amiens is truly easy in/easy out whether for a day trip or staying overnight. If you go for the Christmas festivities, there are no worries about parking or finding your way around. Take the train to Amiens, get off, and THERE IT IS, all right in front of you to enjoy with very little effort. You can't get much more bang for your buck than the price of a train ticket from Paris to Amiens for a day.