As requested, some pics of my railway sleeper project. It's a lot less adventurous than many on your website, but it keeps my patio tidier and Millie (the cat) likes "her" new shady bench.
RAILWAY SLEEPERS USED:
New pine railway sleepers
2600mm x 250mm x 125mm
Your patio looks simply wonderful! Cutting the 3m new pine railway sleepers into such angled retaining walls, is a great way of edging the paved area, and contrasts beautifully with the spikes of the potted plants. I like the tiny raised angled planter box you've created, with a water feature hidden inside (or plant? I can't quite make it out!) The bench too is a real success with its pleasing triangular lines (a great way of using offcuts!)