Kronborg Castle is included on the Discover card, not Hop. Adult entry is €19 (145 DKK) without one. It is 46 minutes by train from Copenhagen.
The Discover card covers the whole castle and the journey there. The Hop card covers neither.
Allow two to three hours inside, plus the walk from the station. The casemates and the Royal Apartments are two very different visits in one building.
The cellars built to hold soldiers and supplies through a siege — low, cold and genuinely dark. At the far end sits Holger Danske, the sleeping Viking who legend says wakes when Denmark is in danger. Bring a phone light; the lighting is deliberately minimal.
At 62 metres, the ballroom was the largest hall in northern Europe when it was finished in 1582. The apartments beyond it hold the tapestries woven for Frederik II, showing a hundred Danish kings — seven of the originals survive here.
Kronborg exists because the Øresund narrows to four kilometres here, and every ship passing paid the castle for the privilege. From the bastions you can see Helsingborg in Sweden clearly on any decent day. It is the best free part of the visit.
Kronborg is the easiest of the big day trips to do on the card — but it is a day trip, and two things catch people out: which card covers it, and which Mondays it opens. Prices and opening times confirmed against kronborg.dk.
This is the clearest difference between the two cards on the whole site: one covers the journey, the other does not go there. For the full picture, see what the card covers on public transport.
It covers Kronborg Castle along with 80+ other attractions and all public transport.
No one sells Kronborg entry on its own. This is a full-day minibus tour that also takes in Frederiksborg, Roskilde Cathedral and the Viking Ship Museum, with a guide and hotel pickup. The card covers all four — €67 at the doors — and the trains there, for less. You are paying for the guide and the driving.
All three are included on the same card, so the only cost of adding them is the time. For the full list, see every attraction the Copenhagen Card covers.
Built by BIG into the walls of the dry dock next to the castle — the building is as much the exhibit as the collection. Underground, so it works in bad weather.
The University of Copenhagen's public aquarium, stocked from the Sound outside the window. Small, cheap and much quieter than Den Blå Planet.
Modern art in a sculpture park above the Øresund at Humlebæk, six minutes back down the coastal line. Open until 10pm Tuesday to Friday.
Entry is €19 per adult and the return train is about €20 — €39 for one day out, before anything else you do. The Discover card covers both, along with 80+ more attractions and unlimited public transport.
Entry is free on the Copenhagen Card Discover, covering the Royal Apartments, ballroom, chapel and the casemates. The Hop card does not include Kronborg — it leaves out day trips beyond Copenhagen. Adult entry without a card is €19.
Opening depends on the month: Kronborg opens on Mondays from May to October and closes on Mondays from November to April. It also shuts on 24, 25 and 31 December and on 1 January. Check kronborg.dk before a Monday visit outside summer.
Nothing needs booking ahead. The castle's own site states card holders get free admission with no pre-registration — walk to the ticket desk, show the QR code in the app and go in. That is unlike Rosenborg, where a same-day timed slot has to be collected.
One scan per attraction is the rule on every card, so Kronborg is a single visit. Given it is a 46-minute train ride each way, that rarely matters — but it does mean you cannot pop out to Helsingør for lunch and scan back in afterwards.
Show the live QR code in the Copenhagen Card app at the entrance and let staff scan it. Your booking confirmation email is not your card, and a screenshot of the QR code will not scan — it has to be the app itself, which works offline once activated.