This week’s theme from Ailsa at Where’s My Backpack is Architecture. These photos were taken on a very grey day in London, on a boat trip down the river Thames, and show the diverse architecture of the city.
The Shard on the left is the tallest building in western Europe, at a height of 310 metres (1,016 ft).
This is the O2 Arena, formerly known as the Millennium Dome (completed in time to welcome the year 2000).
The Old Royal Naval College at Greenwich. In the distance, near the right domed tower, you might just be able to make out the Royal Observatory, which is the site of the prime meridian.