Learn something new on International EarthCache Day

On Saturday, October 7 and Sunday, October 8, earn a new souvenir by learning about the Earth! All you have to do is go out and find an EarthCache during the weekend of International EarthCache Day 2017!

Finding an EarthCache is a great way to learn about the Earth. These geocaches do not have physical containers, but instead bring you to unique locations to teach you a geological science lesson.

Feeling inspired to learn something new? Here are six fun facts we’ve learned from EarthCaches found around the world:

  1. Imperiosus Visum (GC206DF), Arizona, USA

Many know the Grand Canyon was carved out by the Colorado River, but did you know that uplift from tectonic plates aided in the creation of the one mile deep canyon we see today?

Photo by geovi.
  1. Hot Springs, Bath (GC185X3), South West England, United Kingdom

Originating as rain water from 20-80,000 years ago, the water is heated by geothermal action. Rising up to the surface, the springs in Bath [England] are the highest spring water temperature in the UK!

Photo by kiki-64.
  1. Dry Falls EarthCache (GC154BY), Washington, USA

During the Ice Age, parts of Eastern Washington, Idaho, and Montana were severely flooded as rivers forged new paths around ice dams. This EarthCache is located near a 3.5 miles wide and 400 foot tall cliff, which was, at the time, the largest waterfall in the world.

Photo by HockeyHiker19.
  1. Laguna Madre (GC1EHC6), Texas, USA

There are only six hypersaline (saltier than the ocean) lagoons in the world. One is the Laguna Madre (Spanish for “Mother Lagoon”) in Texas!

Photo by thardt.
  1. Geysir – Powerful hot spring (GC1G4XZ), Iceland

Located in Iceland’s Haukadalur valley and discovered in 1294, this is the oldest known geyser on the planet.

Photo by bedla tygrovana.
  1. Namib Desert, Namibia (GC14W63), Namibia, Africa
    At 43 million years old, the Namib Desert is not only named the oldest desert in the world, but is also home to some of the highest sand dunes in the world: the Sossusvlei.
Photo by DivanOli4.

What’s the coolest (or hottest, highest, oldest) fact you’ve learned from an EarthCache?

  • patrice

    The last neat thing I discovered was at Cumberland Falls in KY.. the river rocks that are tumbled smooth are actually made of coal

  • Linda S. Trefts

    The last really cool thing I learned was that one of the largest Glacial erratics (38 feet) is just a few miles from my home on Whidbey Island WA


  • Starkiller_

    I love the idea of an earthcache day souvenir, but it is always tough to
    get out to do an earthcache on Thanksgiving Sunday, and there are never
    new close to home ECs.

  • Tungstène

    I learned something just reading this blog entry: my recently hidden earthcache GC7BCEF is near another one of the only six hypersaline lagoon in the world! I didn’t know there were so few of them.

  • ebbitroll

    A colourful story to tell.

    The story of Vancouver Island (Canada, BC) spans hundreds of millions of years. The island was formed through a combination of processes, including tectonic plate movement, volcanism, erosion and glaciation.

    The story at the Location (GC66RCQ) told by the rocks begins at the end of the Tertiary period when the sands and boulders accumulated in shallow marine waters and ultimately became sandstone and conglomerate.

    The things I learned on site …

    that the geological processes that I see to operate today are the same as those that operated in the past; the current processes reflect those from the Tertiary period, illustrated by the deposition of boulders, gravel and sand at the coastline.

    that the natural laws that govern geologic processes have not changed over geologic time, but that the rate at which certain geologic processes operate can vary.

    “We never stop learning about Earth, and never stop searching for answers. Let the Earth be our teacher.”


  • MJansen

    8 out of 10 EC (abroad) contain foreign language in combination with geological terms, what makes it very hard to understand the listing (I am not native English) AND 8 out of 10 seems to be questions about the color and size of the sparkles in granite.
    So boring.

  • ebbitroll

    That’s absolutely right, but you should also consider that the requirements – and the
    pre-knowledge of the visitors (and owners) – can be varying.

  • Mariana E. Belli
  • Geocaching HQ

    Hello Starkiller_! Per your feedback and similar sentiment we have heard, we’ve decided to open up the souvenir period for the entire weekend! You can now earn your International EarthCache Day souvenir on Saturday, October 7 or Sunday, October 8, 2017. We hope this helps you be able to enjoy both your holiday and geocaching!

  • The cover photo is Seljalandsfoss in Iceland. AMAZING falls!

  • OusKonNé

    Same problem for us. We visited over an hundred Earthcaches that we never logged because we didn’t understand the questions (English is not our first language).

    While some geocachers log Earthcaches that they never visited because they know the answers, other geocachers can’t log Earthcaches they actually visited because they don’t understand the questions…

    Too bad these questions often too complicated!

    To prove our visit, it would be so easy to simply take a picture.

  • OusKonNé

    This will certainly help, thank you!

  • The Basamazingti

    I’m lucky because there is a EC directly where I am on vacation, and yes its a cool one!

  • Maria Nunes

    Oh yeah!

  • barefootguru

    Many of the EarthCaches around me require permission from CO before logging… which can take a few days. Presumably the found date has to be 7th/8th, when does the log have to be submitted by?

  • funkymunkyzone

    That’s against the guidelines of Earthcaches. Once you submit your answers you can go ahead and log.

  • Wesley Morris


  • Denbeastin

    This is a great idea and I will attempt to get the badge – I have found that the several earthcaches I have attempted to get required answering usually a series of questions and emailing answers to the owner, this has proved unreliable as I have both not gotten the cache nor an answer confirming whether I was right or wrong… it seems maybe something more like a multiple choice interface built in to the app that requires no manned response from owners would be a more suitable format to these features. I haven’t had desire to go for these caches because of this. How are the owners monitored for their response/activity ?

  • Oliver Hieger

    I´m nativ Austrian 🙂 And i am happy about english descriptions 🙂 Last time i tried to log some earthcaches in Czech Rep… most of them are only in czech language 🙁

  • Kilimniks

    Thank you so much for doing that! I could never get away on a Sunday to grab a EC. The whole weekend is SO much better!

  • Grant Torrie

    Once you send your answers to the owner of the cache you are allowed to log your find, no matter what the cache listing says: these are in the guidelines for earthcaches. If the owner has a problem that is their responsibility to respond and ask for better answers or more information. Largely, I find earthcache owners to be either very helpful and engaged or absent. Either way, give it a good effort and go ahead and log.

  • Chris Roteck

    I am very new to geocaching (only 4 finds so far) so I’m sorry if this question is ignorant but…
    Where I live, the geography was created by glaciers. We have a Park on one of the islands that showcases some awesome Glacial Grooves.
    My question is… am I able to place an EarthCache there for next year? If so, how do I submit it?
    Thanks in advance!!!

  • Katskoop

    How do I get the “souvenir or badge” if I did find and log an Earth cache on Sunday, October 8?