Netherlands
Andrew Carnegie poured cash into an ambitious project aimed at promoting world peace, but the First World War scuppered that idea. Nevertheless, this imposing gothic hall survives, and now houses the International Court of Justice and one of the world's top legal libraries.
Surprisingly, it is open to visitors so long as you book in advance. And don't forget to inspect the monument outside the gate which includes crystals, stones and rocks contributed by every nation of the world (some more generously than others).
Carnegieplein 2
Tel: +31 70 3024242
www.vredespaleis.nl
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