I searched 'war memorial cross' and scrolled through images.

I eventually found one that looked similar to the one in the photo.

It was a 'cross of sacrifice'.

However there is quite a few of them in many countries.

Woa managed to identify the country from some blurred writing in the back ground (Thailand).

From searching thailand cross of sacrifice I managed to find the place it was in and able to submit the flag.

Just Reverse Image Search this image or use google lens, brings you around this:

Map Link

Most of these challenges don't have flags to submit, so we've included Google Maps Links of the Locations.

After looking arount the image, The Haka Bar is mentioned. Look on google maps near the bern side of the french swiss border.

We can see a Spanish Flag in the background,

and then we can simply google "Spain Tree Man",

which gives us the location of the theme park.

We then look for the structure present in the background,

(the orange rocks) and then using a bit of Google Maps precision stuff, we can get the location pretty accurately

After a lot of research into suspension bridges, we landed at the Ting Kau bridge in Hong Kong New Territories, which is found here:

Map Link

Scan the barcode on the boarding pass with a barcode reader.

Flag:ractf{B0ard1ngP4ssD4t4}