The Roman Theatre in Cartagena has been visited by more than a million people since it reopened as a museum in July, 2008.
The historic site has now been visited by 1,029,717 people, after reaching a record for a single month this July, when 17,672 people visited, a 10.7% increase.
Although the majority of visitors are Spanish, in second place are British, with 42% of all summer visitors being originally from the UK.
The location is easily accessible from the harbour end of the main street through the city and leads through the hillside offering stunning views from the top across most of the cityscape.