For years visitors to Mesa Verde National Park were largely limited to touring cliff dwellings atop Chapin Mesa. Now, however, four ranger-guided hikes have been added to the possibilities of exploring Mesa Verde.

The caves and visitor center at Timpanogos Cave National Monument in Utah close each winter and usually reopen for the season in early May. If you're planning a visit this year, be aware that schedule will change for 2011 to allow for completion of several projects to improve visitor and employee safety.

Search crews at Grand Canyon National Park have turned to high-resolution photography in their search for a single-engine plane that went missing over the park.

Great paddling adventures are ready to be had in the National Park System, whether you intend to spend just a few hours or a week or more on the water. Here's a look at some great choices for where to dip a paddle.