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Three Days in Brussels

The staircase inside the Horta Museum
The Horta house is timed entry with limited numbers, and photography is not allowed. Photograph via Wikimedia Commons, CC BY-SA 1.0

Three days makes room for the Horta house, the Atomium, or a palace that is only open for six weeks a year.

Days one and two

As in the two-day plan.

The Royal Palace of Brussels lit at night
The palace is free — for about six weeks a year, when the family is away. Photograph by EmDee, Wikimedia Commons, CC BY-SA 3.0

Day three — the booked or seasonal thing

  • The Horta Museum — the one that genuinely needs booking. Limited numbers, timed entry, no photography, closed Monday.
  • The Royal Palace — free, but only from late July to early September, and closed Mondays even then. The Mirror Room ceiling is 1.4 million beetle wing cases.
  • The Atomium — a half-day with the travel, and worth booking a slot in summer.
The spheres of the Atomium
The Atomium was built for a world’s fair and meant to last six months. Photograph by Axel Kirch, Wikimedia Commons, CC BY-SA 4.0

The rest of day three

Whichever of these you did not do, plus the Koekelberg basilica — the dome walkway is the widest view over Brussels and you will usually have it to yourself.

Or the comic mural route, which is free and takes an afternoon on foot.

The Basilica of Koekelberg
Koekelberg’s dome walkway is the widest view over the city, and almost always empty. Photograph by Markus Koljonen (Dilaudid), Wikimedia Commons, CC BY-SA 3.0

Fitting it together

Work backwards from the Horta slot, keep Monday for the free European museums, and leave the Atomium for a day you are content to spend on the metro.

Other lengths of trip

Two Days in BrusselsAdds the collectionsFive Days in BrusselsAdds a day outA Week in BrusselsAdds a nearby capital

Journey times and opening patterns as published for 2026 and checked on 5 September 2026. Timetables, fares and closing days change without much warning — confirm with the operator or the institution before you travel. All the plans are in Itineraries & Day Plans.

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