Best we have are in the US??? What about

EGO - the European Gravitational Observatory - is located in the countryside near Pisa in the Commune of Cascina.
In order to ensure the long term scientific exploitation of the VIRGO interferometric antenna for gravitational waves detection as well as to foster European collaboration in this upcoming field, the VIRGO funding institututions (CNRS for France and INFN for Italy) have created a consortium called EGO (European Gravitational Observatory).

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