The origin of crop circles is unknown. There are many theories about how they are created from supernatural phenomena to freak weather conditions, alien activity or the enthusiasm of young farmers. To this day they still remain a mystery of transient art forms.
Crop Circle Information & Co-ordination Centre gives the latest information on the latest crop circles and whether they are open for access.
Wiltshire Crop Circles website will give you a pointer in the right direction.
Crop Circle Etiqutte
The land on which you may see crop circles is owned by farmers who are trying to make a living. Please respect their wishes. Download and read your copy of the Crop Circle Etiqutte before you visit any formations!
A few words of information/advice.
1. Most crop circles are on private land and you may (probably will need) permission to go onto that land.
2. Don't damage anything on private property.
3. Crop circles only last a short time. They are not there for ever. Once the crop has been harvested they will be gone.
4. Crop circles are unlikley to be in the same place in the future.