But while the area operating as a tourist attraction does a booming business, it only represents part of the nature reserve.

BBC: Finding farms, and solitude, in Mexico City

The area became a temporary tourist attraction, but most of it was ultimately deserted, filled with water and became a lake.

NPR: Work Continues, Future Uncertain For Sinkhole Site

The district has boomed recently, thanks to canny local-government officials who realised that the area had become a big attraction for tourists and collectors.

ECONOMIST: Art for the Olympics