Omnisport Apeldoorn is a large indoor sports complex best known for its cycling track, one of the Netherlands' important velodromes. It hosts track cycling, athletics, volleyball, and other events, giving Apeldoorn a sporting venue with a national profile.
It is mainly worth adding to an itinerary if an event is on, but the building also reflects the Dutch seriousness about cycling as both transport and competitive sport. Check the schedule before going; without an event, the visitor experience is limited.