The Ultimate San Marcos Must-Do List: Unmissable Spots to Hit|
https://discoverirvingtx.silverstonebrief.com/posts/outside-the-shopping-centers-more-than-a-few-sights-you-must-see-in-san-marcos-tx
From drifting down the spring-fed San Marcos River and descending into the country's only quake-carved cave you can tour