We asked our readers to send in their best pictures on the theme of "towers". Here is a selection of the photographs we received from around the world.
The next theme is "On the horizon" and the deadline for entries is 20 February 2024.
The pictures will be published later that week and you will be able to find them, along with other galleries, on the In Pictures section of the BBC News website.
You can upload your entries on this page or email them to email@example.com.
All photographs subject to copyright.