Well, yes. How about this? Arriving in Amsterdam on the Friday before the feast of Pentecost. I am not a religious person, so this event would never have crossed my radar. But as my luck would have it, this is a big deal in the Netherlands. And not just on Sunday, but on Monday also.
On Sunday this is all I saw of the market hall in Rotterdam.
And if you were thinking what else could occur, well, how about arriving in Brussels on the week-end of the Jazz Marathon. This was the scene a block from the hotel:
And the scene in the Grand Place was no better: