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thanks, good sharing.

I've been in some limestone caves in Laos, but nothing as big as these ones in the article.

One of the caves I went in Laos we had to walk/crawl for about 800m until we came to a small river inside the cave which we swum in. In hindsite it was pretty dangerous.

It was about 10 years ago I travelled through thailand, cambodia,laos and vietnam as part of a 9 month round the world trip.

I have about 2500 shots from that trip on kodak "max 400 print film". Still waiting to get finalised into albums. remember those things.

Laos was my favourite in this section of my trip as it wasn't overun with tourists and resorts etc. Laung Prabang was my favourite place. Security was a bit of an issue though, the week before we were there some rebels machine gunned a bus and killed a dozen people. Some parts of the country it was recommended not to go to at all. Also if you get off track there was risk of unexploded bombs from the vietnam war. I'm not sure what its like now probably alot better.

pretty cool photos, thanks for sharing

Fantastic!

I have been to caves in Brazil and abroad, but dry ones or with just some water inside.  There is one particularly famous in Brazil, at Chapada Diamantina, for the clarity of its water and the amazing effect of sunrays entering it. 

I have swimmed in a sister cave and it was an awesome experience, because the water is so clear and so still, it feels like floating.


Another also at Bonito:


However, these are all small. I've read in NGM about large caves in the Bahamas and Central America. But although I have dived a few times, cave diving is something I would be totally afraid of.

Photos are amazing, thanks for sharing!!