London

London Eye is one classic (1) in the city of London. It was built to celebrate the new millennium and they had the idea (2) to take it out when 2000 year finish (3). But it was so success (4) that they decided to keep it and nowadays is (5) one of the most emblematic monuments in London. The big wheel has 32 capsules that represented (6) the 32 neighborhood (7) in London.

Heron Tower is the tallest building in the city (8) and the third one in London (8) between 38 and 40 floor (9) you can find two of the most fashion (10) restaurants in London Sushisamba (really good if you like Japanese food) and Duck & Waffle 

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Very nice text! :) Just a few comments:

1. the expression is "a classic", not "one classic".

2. "they" here makes is too specific. Why not "the idea was to..."

3. "the year 200 is over - so we use the verb in the past (finished).

4. you need an adjective here (successful).

5. in English ALL verbs must have a subject (it is).

6. you're talking about something which is true (until today), so you should use the present simple (represent).

7. you need the plural here (neighborhoods)

8. good use of "city" to replace "London" (to avoid repetition), but you should say "London" first. This way it's more logical and doesn't cause misunderstandings.

9. you are being specific here, so "the 38th and the 40th".

10. you need an adjective (fashionable), but I suspect you mean "fancy" here, right?

General comments:

-Attention to punctuation. Yous second paragraph was a bit hard to understand - it has no commas or periods... :O

-You should try to stick to one variation of the language: you used "big wheel" (British) but wrote "neighborhood" (American). The counterparts are "ferris wheel" (AmE) and "neighbourhood" (BrE).