What camera should I take on holiday?
This is a difficult question! And the right answer may occur to you half way through your time abroad! This short reflection may help you decide!
The first question may be "What are you taking photos for?" And the second may be "Will my smart phone be sufficient for my needs" (modern smart phones take excellent pictures).
Do you really need a long lens to get that distant shot (and yes the heron above was shot on a 500mm lens), or would a wide angle camera serve you better with those interiors?
It's probably best NOT to buy the camera at Heathrow and use it for the first time on the holiday (as I have done on more than one occasion!). It's very helpful to try it first in the safety of your own home where mistakes don't matter.
The single element of a camera which folk seem to regret not having is a viewfinder which many modern compact cameras have largely dispensed with: fortunately help is at hand in a very good range of cameras produced by Canon who have retained the viewfinder in their G16 (and recently G17) models of compact cameras.
My other observation about cameras is that you are going to have to lug it around! So its weight must not exceed your fondness for taking photos!