The Lisbon Electricity Museum is a unique example of a well-preserved industrial site.  It opened in 2006 and shows the equipment of the old electricity generating unit in a completely renovated building. It is worth a visit both for those interested in the workings of industrial machinery and those interested in  the esthetics of old machinery and industrial buildings. It is a pity that sites  such as the Battersea Power Station, a majestic building along the Thames in London, are not preserved in the same way.