PlaceLinks

PlaceLinks is a small extension that lets you easily place links to real-world places when composing a message in Gmail.

When writing your message, simply type "@@" and a search bar will appear. Look up the place you want to link to (For example, type in "Louvre"), then select the place from the autocomplete options. A small card with an image and a link will be added to your message, and you can then continue to edit it however you want.