The Barbican Conservatory is a hidden gem in the heart of London, tucked away inside the Barbican Centre. It’s a tranquil hideaway with over 1500 different plants covering the industrial concrete space and looks incredible in photos! The industrial concrete architecture contrasting with lush green plants creates some really interesting images. Plus, it's free to visit, so its worth a visit even if you're not into photography.
Make sure to check the opening times as it's only open on certain days at specific times.