IAG Photo Contest – winner October-December 2025
The winner of the IAG Photo Contest in October-December 2025 is Alena Gessert (Slovakia)! Find below her photo and descriptive text.
If you want to participate in the context, find the rules, guidelines and details on the procedure here.
Sandstone pillars – iconic landforms of the Elbe Sandstone Mountains
by Alena Gessert (Slovakia)

The Hercules Pillars (Herkulessäulen) are striking sandstone rock towers located in the Saxon Switzerland National Park, eastern Germany, within the Elbe Sandstone Mountains. This region is built predominantly of Upper Cretaceous sandstones that are strongly jointed and horizontally bedded. Long-term denudation, selective weathering, and erosion along fracture systems have led to the separation of narrow rock pillars from the original sandstone plateau. Frost weathering, rainfall infiltration, and gravitational processes play a key role in shaping these landforms. More resistant sandstone layers form widened upper parts, while less resistant strata are preferentially removed, locally producing rock-mushroom morphologies. The Hercules Pillars represent an advanced stage of sandstone landscape dissection and are characteristic features of sandstone “rock cities,” illustrating the effectiveness of differential erosion in temperate climatic conditions.













The IAG is happy to release the 2nd issue of its Highlights for 2023, focusing on the period April-June. Find this document in PDF 
The IAG is happy to release the 1st issue of its Highlights for 2023, focusing on the period January-March. Find this document in PDF
The IAG-endorsed Springer book series on “World Geomorphological Landscapes” welcomes its 28th volume! It contains 19 chapters on the “Landscapes and Landforms of Nigeria“. Find details and purchase options










We are happy to publish the first issue of the 2021 IAG Highlights, which summarises the various activities of the IAG in the first quarter of 2021 and upcoming news. You can find a PDF copy
We’re pleased to circulate the latest IAG highlights revamped and compiled by the newly appointed special portfolio memberof the IAG executive committee
Hot on the heels of
The latest addition to the IAG-endorsed series “World Geomorphological Landscapes” is now out! “Landscapes and Landforms of England and Wales”, edited jointly by Andrew Goudie and Piotr Migoń, is available via