Large pieces of cycling infrastructure, like bridges across rivers or major junctions, are easy to get excited about, but here is a rather more mundane example - a small bridge across a cycle path (and footpath), running past a secondary school in Groningen.
There are two school buildings on either side of this cycle path. The bridge allows people to move from one building to the other without coming into conflict with the cycle route.
This is essentially little more than an interesting architectural feature - a surface crossing would suffice - but it also shows the seriousness with which cycle routes are treated in the Netherlands.