But nobody has been able to decode the 2,000-year-old Nazca lines.

The purpose or meaning of the so-called "Nazca lines" is still uncertain.

The famous Nazca Lines, miles long and thousands of years old, were so enormous that they could be seen only from the air.

The main use of the airport is for touristic flights over the Nazca lines.

But the Nazca lines have no readily understood practical application and as art they seem obscure.

The Nazca lines remain as another of early man's energetic but seemingly pointless enterprises.

In cases like the Nazca lines, the features are meaningless from the ground but easily visible from the air.

British nationals should take account of the serious risks involved in flying over the Nazca Lines.

The most recurring motive in the Nazca Lines is the spiral.

Nazca Lines: Supposedly impossible to design without the aid of an aerial view.