Malta
This is a vast, three-level underground limestone necropolis that was in use from about 3600 BC. The 50-minute archaeological tour is excellent and must be booked in advance, as only 10 people are admitted at a time. It is a climate-controlled state-of-the-art facility built with UNESCO assistance.
It is in a small street, Triq-ic-Cimiterju, in the Valletta suburb of Paola, accessible by city bus. Book at www.heritagemalta.org
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