If you're heading to Zion National Park in the coming days, know that you won't be able to drive your car into Zion Canyon unless you have a reservation at the lodge. As of Thursday the Zion Shuttle swings back into action to ease the congestion in the scenic canyon.

Have you checked out the Traveler's flickr page yet? We've got nearly 300 photos from 43 members. If those shots don't whet your interest in arranging a national park vacation, I'm not sure what will. Check out the photos ... and share some of your own!

There are many great national parks outside the borders of the United States. Iguazú National Park in Argentina is one of them, and for good reason.

Yellowstone National Park long has been renowned for its "museum quality" cutthroat trout fishery. Sadly, that fishery is in danger of collapse due to non-native lake trout. There are other threats to Yellowstone's fisheries, though, and that's why the park is developing a Native Fish Conservation Plan.