Amsterdam: Keukenhof & Van Gogh

Keukenhof Gardens - https://keukenhof.nl/en/

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The Van Gogh Museum - https://www.vangoghmuseum.nl/en

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And outside of the Van Gogh Museum and the Rijksmuseum (including a fountain you can stand inside of, and a big silver cube... I don't know what it's purpose was except to look cool in photos)