your free PDF travel guide for Calais
best time to go
Wikipedia says:
Calais (kaˈlɛ; in English often traditional English pronunciation /ˈkælɨs/; Kales) is a town in northern France, located at 50°57'N 1°52'E. It is in the département of Pas-de-Calais, of which it is a sous-préfecture. Although Calais is by far the largest city in Pas-de-Calais, the department's préfecture (capital) resides in its third-largest city of Arras.
The population of the city (commune) at the 1999 census was 77,333 inhabitants (74,800 as of February 2004 estimates). The population of the whole metropolitan area (aire urbaine) at the 1999 census was 125,584.
Calais overlooks the Strait of Dover, the narrowest point in the English Channel, which is only 34 km (21 miles) wide here, and is the closest French town to the United Kingdom. The white cliffs of Dover can easily be seen on a clear day.
The old part of the town, Calais proper (or Calais-Nord), is situated on an artificial island surrounded by canals and harbours. The modern part of the town, St-Pierre, lies to the south and southeast. (...) more....
by 
