We used to be able to reach this meta site from the StackExchange logo which had a drop-down. Not I could not find and but luckily guessed the right URL to ask this question:
Where is the link to travel.meta.stackexchange.com now?
It got moved in the redesign.
The StackExchange logo on the left side of the menu used to be a drop-down menu showing all your sites. Now it's just a link to the StackExchange homepage.
The drop-down menu moved to the far right side of the menu bar now. Click it, and it will show you the "current community" and its corresponding meta site.