Landmarks & buildings
Museum of Stones and Kenji
Museum in Ichinoseki, Iwate, Japan
Museum of Stones and Kenji is a real place Land of the Lustrous was drawn from, named as a model for the setting in its Japanese Wikipedia article. Nothing was filmed here and no story happens here.

Drawn from this place
Japanese Wikipedia says the setting of these manga was modelled on Museum of Stones and Kenji. Nothing was filmed here.
Land of the LustrousScience fiction manga2012