Tallest volcanic columns
Who
Devils Tower
What
178 metre(s)
Where
Vereinigte Staaten ()

Devils Tower in Wyoming, USA, was formed as an underground intrusion of igneous rock, more than 50 million years ago. Over time the surrounding softer sedimentary rock eroded leaving the monolithic landmark towering over the current landscape. It is composed of volcanic columns, formed as the magma intrusion cooled and shrank, some of which are around 585 ft (178 m) in height. Another famous example of this type of volcanic column can be seen at the Giant's Causeway in County Antrim, Northern Ireland.