Stand on the Meridian Line at the Royal Observatory, with one foot in the eastern hemisphere and one in the west.
The Monument is a memorial to the Great Fire of London in 1666. It was designed by Christopher Wren and Robert Hooke, and built between 1671 and 1677. It measures 61 m (202-feet) – the exact distance from its base to Pudding Lane, where the fire broke out. A flaming copper urn sits upon the top, to symbolise the flames.
The Monument is the tallest single stone column in the world. You can also get a good view from above, by climbing the 311 steps to the Monument’s viewing platform.
Marble Arch may be on the move again. Transport for London is looking at the option to move the arch away from its traffic island to improve traffic flows at this busy junction. If approved, the arch will move over the road to Speakers’ Corner.