Namur is the capital of Wallonia, the French-speaking southern part of Belgium.
Namur is located 60 km south-east of Belgium's capital city, Brussels.
It is easily accessible by road (the E411 highway from Brussels), train or boat (the Meuse comes from France and the Samber flow through Namur where they actually meet).
Namur is a substantial city and might be too large to discover on foot. The layout of the city is complex and navigation is not easy. Cycling does not appear to be very popular with the locals, perhaps due to the number of cobbled streets. On the other hand, many one-way streets are "except bicycles", so cyclists enjoy special privileges.
The biggest tourist attraction is the citadel. It is situated on a hill next to the river Meuse (Dutch: Maas) and open for visiting. On a rainy day, the Museum of Old Namurois Art is also worth a visit. It has recorded guiding in English and a collection of Medieval and Renaissance Christian art. The Archaeological Museum, mostly displaying artifacts from Roman Namur, is less organised and interesting. Much of the old city is beautiful, in a rather French style.
On no account should the treasure of Hugo d'Oignies be missed. 
Hire a bicycle and cycle up and through the Citadel. This is better than doing it on foot as the access road is mostly wide and uninteresting. There is also a network of mountain bike itineraries beginning and ending in Namur, but the signage, which is very good at the beginning, with large coloured arrows painted on the road, suddenly vanishes without explanation.
A tour company in nearby Dinant (Les Kayaks Bleus, www.lessekayaks.be) organises river kayaking trips. It would probably be possible to paddle downstream all the way to Holland and the North Sea.
There are public swimming pools in Salzinnes and Jambes.
University of Namur (Facultés universitaires Notre-Dame de la Paix) . More than 5,000 students.
Namur is often said to be an "open sky" shopping mall. Major shopping streets stretch from the Namur train station to Rue de Fer and Rue de l'Ange where you will find normal fashion outlets like H&M, Newlook,Zara, Kim Pie,Cool Cats, O' Appels, Charles Vogele Switzerland, Esprit, JBC, C& A, Women's secret, ICL Paris IV, Di, Camaieu among others.
The inner city supermarkets are one Match and one (smaller) Spar.
Other supermarkets are Carrefour and COlruyt in Jambes and another Colruyt and Delhaize in Salzinnes among others.
Pâtisserie Café Dumont (Rue de Marchovelette 21) has waffles with whipped cream and melted chocolate that are downright decadent. Opening hours 07:30 to 18:30 Monday to Saturday (so one could have breakfast there), 14:30 to 18:30 on Sundays.
Le Panorama restaurant, on the Citadel (Route Merveilleuse 82, Tel. 081/222804) has a terrace with a great view over the city and the river and a free Wi-Fi hotspot. Plat du jour costs under €10.
Le Chemin du Cedre (Rue Saint Loup 4) has great Lebanese food at moderate prices. The 'prestige plate' is a very nice set of small dishes. Lovely nice garden.
Good open sandwiches at Le Père Gourmandin (Rue du Président 8).
Galler is a chocolate shop-cum-café. The café is exquisitely old-fashioned and offers a wide range of hot chocolates. Les Thés de Sophie also sells and serves speciality teas.
Peanuts, Rue de l'Ouvrage 3. Nice beers and a cosy terrace.
The Youth Hostel is right by the river and it has free unlimited Wi-Fi, a nice view, a good self-catering kitchen and a bar. They close all common areas by 23:00, however. Guests are required to wash their own dishes after breakfast.
Grand Hotel Le Flandre. Right in front of the railway station; the rooms are ok, breakfast is good. Check the regular sites (Booking.com, Tripadvisor etc.) for offers: double rooms can be had for as low as 69 euros.
Namur might also be your gateway to the Ardennes and Luxembourg. There is an international train going to Basel, Switzerland and from there to Zurich and Chur.