Sinkholes

[CMAC]

The 1st looks photoshopped.

The last one is quite amazing when you read it

http://www.telegraph.co.uk/news/pic...sed-roads-around-the-world.html?frame=2499627

 

[GreiginFife]

That's mental.
Not quite to that scale but the village I grew up in was terrible for sinkholes opening up. The adjoining village was worse as it was built on 13th century monastery mines. In one case a guy was in his garden, went in to the house and heard a noise "like gravel being tipped out of a trailer" and opened the door to find a 10ft sinkhole around 30ft deep and his pigeon loft gone.
When it was investigated it was found to have opened on a mine shaft that went into a spiders web of other shafts all under the village and miles around. Months of work shoring it all up then ensued.

 

[Khamelion]

The last one, the Gates of Hell, is amazing, been burning for 40yrs, that's a lot of gas.