Many touristy places have spot where they’ll take your photo in front of a green screen or a blue screen, and then add in different backgrounds.
If you are planning to do this, one fun thing to do is to try and wear something that matches the green screen or the blue screen. The effect will be to make yourself look partially transparent!
In the photos below, the one taken at the Rock and Roll Hall of Fame was done in front of a green screen, and both of my kids look normal.
The photo taken at the Willis Tower in Chicago was in front of a blue screen that matched the blue on the Twenty-One Pilots sweatshirt design. As a result, you can see the city of Chicago right through parts of the sweatshirt!
Of course, if you don’t like being transparent, avoid wearing those colors on vacation!