After Buckingham Palace, we walked on towards the Thames, passing Westminster Abbey and the Houses of Parliament:
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Crossing the Thames, we see the London Eye, our goal (and hoping that queues are not too long for it). Surprisingly, and perhaps confirming all the newspaper reports of lacking tourism in London, we were riding the Eye within half an hour of arriving – spectacular views!
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On the (long) walk back to the hotel, we traveled via Trafalgar Square, Regents Street, Oxford Street, Marble Arch …
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M&I / GBMINI 
Hey, where did ya get that kooool shirt? Ha.
We had about the same wait a few years back…