Any landform - either rock or earth - that stands vertically, often spire-shaped, and often naturally formed. 

For extremely tall natural 'pillars', see [[karst]].

Real-life pillar landforms include the <i>hoodoo</i> [tn][1][/tn] and <i>tulin</i> [tn][2][/tn].

h4. External links
* [tn][1][/tn] "Wikipedia: Hoodoo (geology)":[https://en.wikipedia.org/wiki/Hoodoo_(geology)]
* [tn][2][/tn]  "Wikipedia: Tulin (geology)":[https://en.wikipedia.org/wiki/Tulin_(geology)]

h4. See also
* [[Pillar]]
pillar (landform)