EarthCache weekend – Explore Edinburgh’s geology

The dramatic and beautiful city of Edinburgh is draped over an impressive topography that reflects a variety of bedrock formed by different processes and a long story of erosion, particularly during the Ice Age of the last 2 million years. In the city and in the surrounding countryside, this geology and topography has been used by people over thousands of years, in many different ways: for habitation and defence, farming and fuel and as inspiration for a rich culture. It has inspired great geological thinkers too, especially the father of modern geology, James Hutton, who spent most of his life in Edinburgh and discovered one of the world’s most significant geological sites at Siccar Point.

EarthCaches in Edinburgh

This remarkable story of geology and people has resulted in many EarthCaches being established in the city and the surrounding area. An EarthCache is a specific location that people can visit to learn about geology. EarthCaches are part of geocaching (an adventure game based around the use of GPS to find caches of small hidden treasures) but an EarthCache doesn’t involve a physical cache, rather it involves visiting a specific location and learning about our planet.

Existing EarthCaches in Edinburgh explore the geology of important sites such as Siccar Point, Holyrood Park and the Pentland Hills, and the human story of geological investigation and the use of materials. To celebrate this, Edinburgh Geological Society is hosting a weekend of events focussed on EarthCaches.

If you have any questions about the weekend, please contact Angus Miller, EGS Promotion Secretary,

Buy the souvenir Edinburgh EarthCache Geocoin

We have made a special Edinburgh Earthcache Geocoin. This is an attractive trackable silver coin, which is available for direct sales at EGS events or by mail order.

You can order an Edinburgh Earthcache Geocoin here.


Friday 6 October, 6.30pm: welcome and introduction

The Society will welcome visitors to the city with an informal lecture that explores the geological story of Edinburgh and the surrounding area. Experts will be on hand to chat and answer questions, and help plan your EarthCache explorations. Venue: upstairs meeting room, Costa Coffee Hanover Street, Edinburgh EH2 2DL.

Event information on

Saturday 7 October, 11am-3pm: EarthCache Event, Holyrood Park

Holyrood Park and Arthur’s Seat contain some spectacular geology in the heart of the city. There are more than 10 EarthCaches in the immediate area for you to explore. If you are new to EarthCaching, volunteers will be on hand to tell you more and point you in the right direction.

Event information on

Sunday 8 October, 10am-5pm: EarthCache coach tour, East Lothian and the Borders, including EarthCache event at Barns Ness, East Lothian

To the east of Edinburgh there is some beautiful countryside and coast with some fantastic varied geology and many EarthCaches. This coach tour from the city centre will visit several EarthCache sites, including an EarthCache Event at Barns Ness, East Lothian and the world-famous unconformity at Siccar Point.

Barns Ness Event information on

Book a place on the coach via Brown Paper Tickets –