Auguste Rodin, CC BY-SA 3.0
Calais is often overlooked by Brits passing through on their way to far-flung places, but they're missing out on some little gems and the odd dragon. It's a major port between France and England located on the Opal Coast and has a wide sandy beach and a number of attractions that are well worth a look.
Rodin's famous sculpture of the Burghers of Calais stands in front of the ornate Hotel de Ville with its 75-meter-high belfry. The Museum of Lace and Fashion is housed in what was once a 19th ceutry lace factory and includes working lace-making looms, as well the work of great coururiers and renown young designers. In the Parc Richelieu you'll find a memorial to Lady Hamilton the paramour of Lord Nelson who ended up living an impoverished life in Calais after Nelson's demise.
Rodin's burgers of Calais
If you have an hour or two to spare waiting for a train, why not go for a wander?
Tourist info provide a set of walks and hikes here.
I've also made a downloadable PDF and accompanying google map which will give you a feel for the place and take in the sights.
If you'd like a guided tour, Tourist info provide details here . They also offer a greeter service - locals who will show you around their town. You can find out more about it here
If you want to stroll without a care in the world, including your luggage, you could try using Bounce to find a place that will take your bags.
Tourist info: https://www.calais-cotedopale.co.uk/
Here's a link to tourist information: Tourist info website
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