Wonderland originated in the United States but also operated in Australia, Austria, Belgium, Finland, France, Germany, Italy, Norway, Portugal, Sweden and Britain.

Members joined, by invite only, on condition that they provided 10,000 images of children different from the hundreds of thousands of others already stored on the club's database.

One Italian member had 180,000 images.

The images uncovered by the raids in 1998 that finally broke the ring included photographs of naked boys and girls, aged from infancy to puberty.

One was a baby less than a year old.