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Wikipedia entry for the Great Depression, with details on the causes and results of the depression, including for Europe. Good amount of information on the responses to the Depression in Nazi Germany and in Britain under Ramsey MacDonald. Also has many internal and external links to further information.
While the focus is on the United States and North America during the great depression, the page also features the effects in the Europe and in the rest of the world. The causes, and consequences, are explained as are such factors as the use of the gold standard. Also includes several maps and graphs that chart unemployment, government spending and intervention, and industrial production in the United States, Europe and worldwide throughout the 1930's.