Weekend Hashtag Project is a series featuring designated themes & hashtags chosen by Instagram’s Community Team. For a chance to be featured on the Instagram blog, follow @jayzombie and look for a photo from her announcing the weekend’s project every Friday.

This weekend’s theme was #tunnelvisions, which asked participants to search for tunnels to photograph. Every Monday we feature some of our favorite submissions from the project, but be sure to check out the rest on Instagram here.

Photos by yalinbuyukdora, melliemelg, melanierin, frau_hecht, hannaeffie, miss_jess, wesq, stevecarter, skipintro, kasyah, nwittwerkbetti.