New vs old - architecture  

Wow
They look like photochops.

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If only!

The second image definitely looks like a Photoshop job.
It looks like a postmodernist shocker is inches away from swallowing a genteel Georgian town house.
This is what Prince Charles's nightmares look like.
If this is real, where is it?

Real it is!
Its the art gallery of Ontario. Here is another picture in all its glory.

My god....it's...
My god....it's incredible...... in all it incongruous nastiness.

I am going to
have to respectfully disagree here on one issue. IF IT IS DONE RIGHT, melding contemporary architecture into/onto an historic building can be breathtaking.
The two examples above are hideous. I will post a picture from Bilbao, Spain where the architect(s?) did a great job.
In the museum pictured above, the original building is off-putting, in my opinion. It looks like a 1960's mock-up of faux colonial.
Off to search my pix.

Wow...that certainly...
Wow...that certainly commands attention.
Reminds me of the Christian Cathedral built upon a Muslim Mosque during the age of Crusades (see link bleow) In both of these cases, the assertion is fascinating.
http://en.wikipedia.org/wiki/Cathedral%E2%80%93Mosque_of_C%C3%B3rdoba

Yes
I have seen it done well as well... Often shown in magazines, etc.
These two examples, however, not so much.

I quite like this place that...
I quite like this place that was recently for sale on the Modern House..Pics won't work but a link below.
http://www.themodernhouse.net/tmh/sales/343/intro/0/0/8

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Disagree with who Riki? the thread is about modern extensions on old buildings done badly. I hae lots of books with amazing architecture but I see so much walking around that just should not have been allowed.

I agree Riki, I'm a modernist and not against the mixing of styles.
When an architect gets it right a blending of contemporary and historic styles within close proximity can create an interesting and complimentary mix.
A walk around the streets of London will provide plenty of examples of this.
Buildings in london both historic and modern are rubbing shoulders with each other due to the hasty rebuilding after the war, most of the time it works beautifully and produces a very interesting built environment.

Sorry,
Arthur, I didn't realize that you only wanted to talk about ill-fitted marriages on your thread.

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Well it seems no one else does so do as you will

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Or maybe its because the two I have shown are so extreme everyone wants something beautiful to look at?
How about this as an example of my original point.