Our nearby Camel Rock lost its mouth in 2017. At first they considered the possibility of vandalism, but ultimately ruled it just a case of natural forces.
Tripler
T’was a big local news story when it happened.
The Twelve Apostles are a spectacular series of limestone pillars almost in the water along the Great Ocean Road in Victoria, Australia.
The actual number keeps changing depending on when they fall or become stubs, but one major one went in 2005 and another shortly after in 2009.
To be a pedant, the 2009 collapse was one of the nearby Three Sisters, but the coastline along the Great Ocean Road has plenty of these features which are periodically collapsing, and presumably infrequently being created.
Disregard.
There was a natural bridge in upstate NY that fell, they still call it natural bridge but the bridge part is no longer there, just the water into the rock remains, so it’s more of a natural drain pipe now.
In the upper falls of Bash Bish falls in MA, a large rock at the head of the falls came down changing that quite a bit as the falls continue upstream. There use to be a great 6 ft deep swimming hole there and last I saw it was maybe a foot deep. Unfortunately it also looked like they closed it to public access from the upper lot which is the easiest approach and I have not seen it this year yet.
The Kerguelen Arch collapsed a little over a century ago. I became fascinated by the Kerguelen archipelago when I was in high school, since it is the closest point of land to the exact opposite side of the world from where I lived. I read the book by Kauffmann referenced in the Wikipedia article.
This former arch is pretty small as they go, but has some interesting features. As well this whole website might be of extra interest to some posters here:
Wall Arch in Arches NP collapsed in 2008:
Cripes. Are there any new arches, or a we living in the arch apocalypse?
I remember this one because of the notable fact that tourists were on part of the arch which did not collapse. I think I’ve seen this one before it collapsed.
The span closer to the shoreline collapsed unexpectedly on 15 January 1990, leaving two tourists (Kelli Harrison and David Darrington) stranded on the outer span before being rescued by police helicopter.
Last Sunday’s Ziggy, of all comic strips, was actually relevant to this topic:
In 1988, Namibia’s Mukurob collapsed. It was one of several rock formations in the world called “Finger of God.”
Natural bridge in Montana that collapsed in 1988, now it’s just a trick waterfall. Picture of a before picture in the gallery here.
No, just a lot of arch enemies…
This pic of us was taken a couple of months before the storm collapsed it.
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The Hilary Step at the top of mount Everest is apparently not what it once was. https://phys.org/news/2018-05-everest-hillary-slope-climbers.html
When I visited Arches NP, I got a great shot of Delicate Arch, by lying under it and looking up at its underside. But alas, I couldn’t get a similar shot of Landscape Arch, as the area directly under the arch is not open to visitors.
One of the turrets of Miner’s Castle collapsed in 2006:
Grand Portal is still there, but you can no longer boat under it:
http://www.fishweb.com/maps/alger/pictured_rocks/grand_portal_point/index.html
Brian
It’s over a hundred years ago, but still notable.
In the Flume Gorge in Franconia Notch in New Hampshire, there used to be a huge boulder suspended between the two walls of the gorge. It was too big to fit between them, and so it stayed there, apparently suspended for all time
https://www.nhstateparks.org/visit/state-parks/flume-gorge
Emphasis mine.
Here’s a picture of it
https://www.nhhistory.org/object/276459/suspended-boulder-at-the-flume-in-franconia-notch-nh
Here are some more pictures of the boulder, about halfway down
I suppose that the boulder must have been smashed into smaller pieces, which is why it was never found. But I’m still awed that any sort of flooding down the gorge would have even reached the boulder, let alone have such force that it could sweep that heavy rock out of its perch.