Up until recently the only place to look for good practice was continental Europe. That is beginning to change, but it remains the place to look for widespread usable cycling infrastructure. Of course to see widespread best practice one must look at the Netherlands.
Germany has an odd mix of infrastructure that does not always specifically cater for cyclists, but which can be very good. As ever, the better it is, the higher the modal share of cycling. Whilst often not very special, the cycling infrastructure is often very much usable.