Which country is known as bicycle country?

Could you please elaborate on the notion of "bicycle country"? Are you referring to a nation that is renowned for its extensive cycling infrastructure, a high number of cyclists per capita, or perhaps a cultural affinity towards cycling as a primary mode of transportation? There are several countries that could potentially fit this description, but without further context, it's difficult to definitively say which one is most commonly referred to as "bicycle country." Is there a specific region or aspect of cycling culture you're interested in exploring?