2. Tower Bridge
Tower Bridge has stood over the River Thames in London since 1894
and is one of the finest, most recognizable bridges in the World. It is
the London bridge you tend to see in movies and on advertising
literature for London. Tower Bridge is the only Thames bridge which
can be raised.
Its middle section can be raised to permit large vessels to pass the
Tower Bridge. Massive engines raise the bridge sections, which weigh
about 1000 tons each, in just over a minute. It used to be raised about
50 times a day, but nowadays it is only raised 4 to 5 times a week

3. Palace of Westminster
From the middle of the 11th century until 1512 the Palace of
Westminster was the royal home to the Kings and Queens of
England, hence the name.
The Palace of Westminster features three main towers. Of these,
the largest and tallest is the 98.5-metre (323 ft) Victoria Tower,
which occupies the south-western corner of the Palace.

4. Big Ben
Big Ben is the nickname for the great bell of the clock at the north end of the
Palace of Westminster in London, and often extended to refer to the clock and
the clock tower, officially named the Elizabeth Tower, as well. Elizabeth Tower
holds the largest four-faced chiming clock in the world and is the third-tallest
free-standing clock tower. It celebrated its 150th anniversary on 31 May 2009,
during which celebratory events took place. The tower was completed in 1858
and has become one of the most prominent symbols of both London and
England.

5. London Flag
The flag of the City of London is based on the flag of England, having a
centred red St George's Cross on a white background, with the red sword in
the upper hoist canton (the top left quarter). The sword is believed to
represent the sword that beheaded Saint Paul who is the patron saint of
the city. The sword always faces upwards, when the flag is held on its side
as a banner, the sword would be printed to face hoist and would be located
on the left as it is hanging down.