Cologne or Lille?

Neither city is a beach destination, and they fall short in different ways. Cologne keeps you out of the Rhine but has flooded gravel pits such as Fühlinger See and Otto-Maigler-See on its edge. These are grassy-banked lakes where the water warms to about 22°C on a hot day, good for an afternoon swim.

Lille has no lakes to speak of, but it is closer to the sea. Malo-les-Bains at Dunkirk is about an hour away by train. Expect a wide, windy North Sea beach with cold water, better for a bracing walk than for swimming.

Lille eats better, and in a way more tied to its region. The estaminets of Vieux-Lille serve carbonnade, potjevleesch, waterzooi and the cheese-heavy welsh, with Maroilles turning up everywhere and Belgian and northern French ales poured alongside. The Sunday market at Wazemmes and the city's famous waffles round it out.

In Cologne the Brauhaus experience matters more than the cooking. The Köbes keep the small glasses of Kölsch coming, the plates are hearty sauerbraten and Himmel un Ääd, and Ehrenfeld's Turkish food adds variety. It is enjoyable, but less of a reason to come.

The two are closely matched, but the appeal differs. Cologne is about standout monuments and collections: the cathedral and its Shrine of the Three Kings, twelve Romanesque churches, Roman remains, and Museum Ludwig's Pop Art. Between them, though, the post-war streets are plain.

Lille has one great museum, the Palais des Beaux-Arts, and a more complete historic townscape. Vieux-Lille's Flemish baroque brick, the Vieille Bourse and the belfry make the walk between sights part of the pleasure. La Piscine in Roubaix is worth the metro ride.

Cologne offers the longer and more varied night out. Evenings move from the Altstadt brewhouses to cocktail bars in the Belgian Quarter, the Zülpicher Strasse student strip and clubs in Ehrenfeld's old factories. One of Germany's largest gay scenes centres on Rudolfplatz, and at Carnival the whole city is out in costume.

Lille has a friendly student crowd on Rue Masséna and Rue Solférino and calmer beer and wine cellars in Vieux-Lille. Its clubs are few, however, and serious late nights have usually meant heading over the Belgian border.

Within about forty minutes of Cologne the flat river plain gives way to the wooded volcanic hills of the Siebengebirge, where marked trails climb to the Drachenfels crag above the Rhine. Closer still are the Grüngürtel parks and long riverside cycle paths. About an hour away, the Eifel region has several kinds of country: a national park, crater lakes in its volcanic uplands and, in a separate valley, the vineyard slopes of the Ahr.

Lille's surroundings are gentler and flatter. French Flanders is farmed lowland. The Citadel park and the Deûle towpaths make easy outings, and the low Monts de Flandre give wide views, but for real scenery you need a long day out to the Opal Coast cliffs at Cap Blanc-Nez.

Both are excellent bases, but Lille's reach is exceptional. Brussels is about half an hour away, Ghent and Bruges around an hour, and Paris an hour by TGV, with London possible on Eurostar. Closer to hand are Arras, Amiens cathedral, the Louvre-Lens and the First World War battlefields.

Cologne's outings stay closer to home and run along the Rhine: Brühl's rococo palaces, Bonn, Düsseldorf, Charlemagne's chapel at Aachen and the castle towns of the Rhine Gorge. Brussels takes nearer two hours.

A major theme park lies a short trip south of Cologne at Brühl, and that alone tilts the balance. In the city itself there is an old zoo with an elephant park and aquarium, the Chocolate Museum with its chocolate fountain, and a cable car over the river to the Rheinpark playgrounds, which together fill several days. Brewhouses are relaxed about children, but Carnival week is best avoided with little ones.

Lille has the small Citadel zoo with playgrounds beside it and a hands-on science centre reached by metro. Its bigger draws, a large zoo park over the Belgian border and the aquarium at Boulogne, mean a journey. The cobbles of Vieux-Lille are hard going with a pushchair.

Both are flat, walkable and easy to manage without a car. Arrival works similarly too: Cologne's main station stands beside the cathedral, and Lille's two stations sit side by side near the old town.

The difference is in the transit beyond the centre. Lille's driverless VAL metro and tram are simple to use. Cologne's mix of trams, Stadtbahn and S-Bahn covers more ground, but the map is confusing and services can be crowded. Cologne's long riverside cycle paths are a bonus.

There is little to separate them, and in both the independent quarters beat the high streets. Cologne's Schildergasse and Hohe Strasse are mass-market chain streets, Ehrenstrasse and the Belgian Quarter have the concept stores, and Eau de Cologne from the historic Glockengasse perfume house makes a local souvenir.

Lille's chains sit on Rue Neuve and in Euralille, and Vieux-Lille has the delicatessens and design shops. Timing matters in each: Cologne's Advent Christmas markets, or Lille's September Braderie, a citywide flea market.

Costs are much the same in both, mid-range for Western Europe. A brewhouse meal with Kölsch or an estaminet dinner with ale is fair value, and transport is reasonably priced.

The catch in each is hotel rates at peak times. In Cologne these are the Messe trade fairs and Carnival. In Lille they are the Braderie and its own fairs. Check those dates before booking either.

Two major orchestras share Cologne's Philharmonie, the acoustically admired hall beneath the square beside the cathedral, and the WDR adds a big band and choirs. The opera and the Schauspiel share Offenbachplatz, and the Romanesque churches host early music. The popular side is just as deep, with jazz, a long electronic music tradition, gigs in Ehrenfeld and the Südstadt most nights, and the dialect songs of the Carnival sessions, which exist nowhere else.

Lille's programme is smaller but dependable: the grand Opéra on the Place du Théâtre, the Orchestre National, the Théâtre du Nord and touring bands at the Zénith and the Aéronef. It is a season to catch while you are there rather than one to plan a trip around.

Cologne is far better for unwinding. German sauna culture is a weekend habit there, with large sauna landscapes, cold plunges and quiet rooms, plus a mineral-spring thermal bath in the Rheinpark facing the cathedral. Aachen's Roman-era hot springs are close by.

Lille offers hotel spas and slow afternoons in Vieux-Lille tea rooms. The nearest proper thermal bath is a train ride away at Saint-Amand-les-Eaux.