Editing Llanes (section)

== Caves ==
 
The district contains numerous caves, including a site of archaeological interest at Nueva, and the Cueva Bolado ({{coord|43|24|04|N|4|45|51|W}}) near La Pereda which also contains ancient art as well as open passages.

There are also several significant 'wild' cave systems, including

* the Bolugo-Caldueñín system under [[El Mazuco]] (the ''Río Belugas'', which sinks at ({{coord|43|22|45|N|4|51|03|W}}) and resurges at {{coord|43|22|48|N|4|51|54|W}})
* the Rales system<ref>[http://www.speleogroup.org/Rales_System.html Rales system] – exploration history</ref> ({{coord|43|24|43|N|4|53|39|W}})
* El Cuevón de Pruneda,<ref>[http://www.speleogroup.org/Pruneda.html El Cuevón de Pruneda] – exploration history</ref> near Purón ({{coord|43|22|39|N|4|43|23|W}}).

These systems were first systematically explored by [[speleology|speleologists]] from the Oxford University Cave Club<ref>[http://www.oucc.org.uk/expeditions/expeditions-spain.htm Oxford University Cave Club] – proceedings and reports</ref>  and from Speleogroup.<ref>[http://www.speleogroup.org/ Speleogroup] – expedition logs</ref>

In addition, it is suspected that there is a significant cave system underlying La Llosa de Viango.<ref>[http://www.Speleogroup.org/sg2003.html#05.07 Cave system underlying La Llosa de Viango] – July 2003</ref>