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Los Angeles

I am going to tell you about Los Angeles City. The population of the city is around 3 831 868 people. Los Angeles is the second largest city in the country after New York. There are people from around 140 different countries living in Los Angeles. There is a river called Rio Hondo. It has an area of 468.67 square miles. The weather here is usually sunny and warm. Humidity is low, sometimes there are little rains.
Los Angeles is the world entertainment capital, a cultural centre that has more than 300 museums.
The most amazing part of the city is Hollywood. On the Mount Lee Mount the world famous «Hollywood Sign» and the American film industry are located. This is the place where almost all the tourists take pictures. I was greatly impressed by the Los Angeles Zoo which is located in Griffith Park. The most interesting building is Walt Disney's concert hall.
From my opinion the park of entertainments "Six Flags Magic Mountain" located to the west from Los Angeles bay is the best place in Los Angeles.
I'd like to visit the pier of Santa Monica. This is the entertainment centre where you can ride a carousel.

Если что-то непонятно, спрашивайте, я объясню :-)

Парочку предложений тоже хочу подкоррктировать вслед за предыдущим ответом:

The population of the city is about 3 831 868 people.
the Rio Hondo ( с названиями рек артикль нужен)
On the Mount Lee Mount - тут достаточно только " the Mount Lee " (гора Маунт-Ли) не добавляя еще раз слово "гора".
ride a carousel - можно так же использовать вместо "carousel" слово "merry-go-round", мне кажется оно встречается в текстах чаще.