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This search - which covers the municipality of Lagos, near Praia da Luz - will continue until Friday across a 21km sq site between where Madeleine went missing and where the German investigators' prime suspect had been staying at the time.

According to a government press release, the museum has been built at a cost of $35m and is spread across 12,500 sq m.

Yellowstone, the US's oldest national park, covers nearly 3,500 sq miles in three states, including Idaho, Wyoming and Montana.

There is no sign that China is permanently occupying the 200 sq metre island and the coastguard is reported to have left.

In Galloway Forest Park, in south-west Scotland, an estimated 65 sq km burnt, nearly a quarter of the UK total.