Another travel tip:
Fill the frame.
Get close to your subjects – it is not necessary to show the whole subject with all its distractions surrounding it. Get close, as in this image from a while back at the British Museum:
Too many other tourists? Then filling the frame is a great way to eliminate them!
You do this in two ways: get close, and zoom in. And don’t be afraid to go vertical, or even tilt, if you feel it helps fill the frame.