And what do you think of this one?  

Doesn't have to be basalt to be columnar, so searching for the exact phrase may not show all images of these features. For example, Devil's Tower is made of phonolite.

Diabase/dolerite is also commonly columnar.

Günter,

Most examples one sees of columnar volcanic rocks show more or less parallel, and usually vertical, columns.  The Feldstein Cliff example is distinctive for showing a dramatic radial structure.

Harold,

True enough, and it's good to be reminded that not all dark volcanic rocks are basalt.  I'm thinking of the layman or school kid who stumbles across a photo captioned "columnar basalt" somewhere, doesn't really know what "basalt" is but is intrigued none the less, and just does a search to see more examples.  He or she is more likely to search for "columnar basalt" than for "columnar jointing in various volcanic rocks".

Greetings from Iceland!

Greetings from Tasmania!

Another from Neuwied, Rhineland-Palatinate, Germany.

The “Basaltsteinbruch Bennaukopf” basalt quarry, in 1901. Vintage picture postcard (“ Serie II. Brölthaler-Eisenbahn. AK No. 9”), photographer Rudolf Stolle, Bad Harzburg.
G. Grundmann collection.

 

Hardly in the same league as most of the examples we have seen--I echo Tony Albini's thanks for all of the wonderful images--but here is a picture postcard view of columnar basalt being quarried near Emigrant, Montana, just south of Livingston.  Scale is not indicated and is difficult to judge from the photo.

The caption on the message side of the card reads "Columns of Basalt Rock near Emigrant, Montana, are broken for bridge riprap [boulder-sized rock used for erosion control along riverbanks, around bridge piers, etc.] and crushed for railroad track ballast.  The Lyons Construction Co. operates the quarry for the Northern Pacific Railway Co."  The card is not dated; I purchased it new, probably in nearby Livingston, Montana, in 1997, but the NP merged into the Burlington Northern Railroad in 1970.  I can believe that a supply of this card could have sat in the shop for 30 years--this image would not be a "big mover" in the scenic postcard business.

This may be the Merriman Quarry, Emigrant Creek Mining District (Chico Mining District), Park County, Montana, USA, which appears from the maps on Mindat to be the only current quarry that could be said to be "near Emigrant", and it is located in an isolated area of basalt as indicated by Macrostrat geology.  The Mindat locality marker is a few km east of the quarry on the map.  Google maps identifies the same quarry as the Black Diamond quarry.