Lowell Observatory - History and stargazing meet on the 108-year-old Mars Hill campus where Pluto was discovered. Visit the wonderful interactive exhibit hall, or attend an evening program with telescope viewing and a discussion of the night sky. 
www.lowell.edu

Stargaze at the Lowell Observatory

Riordan Mansion - Built in 1904 for two prominent Flagstaff families, the Mansion is an impressive reminder of gracious living in a small, territorial logging town. The rustic Arts and Crafts style mansion has forty rooms (plus servant's quarters), and features an exceptional collection of Craftsman furnishings with appointments by Edison, Stickley, Ellis, and Steinway
www.pr.state.az.us/parkhtml/riordan.html

Grand Canyon - One of the Seven Natural Wonders of the World, the Grand Canyon is simply spectacular. Incomparable vistas, unparalleled hiking, remarkable architecture, amazing wildlife, extraordinary history...what more can we say?
www.nps.gov/grca/

Hike the Grand Canyon

Jerome, Arizona - From a boomtown, to a ghost town, to a lively artisans and writers community, Jerome has seen it all. It's a breathtaking drive to this old mining town, which clings precariously to the side of a mountain. Explore its history while enjoying its rebirth as an artist colony. 
www.americanwest.com/
pages/jerome.htm

Visit ghosts (and artists) In Jerome

Museum of Northern Arizona - Visitors to this beautifully forested campus can view exhibits relating to anthropology, biology, geology, and fine art of the Colorado plateau. A dynamic intergenerational community as well as a museum, the campus includes a charter high school; a senior living community, a residential field camp for Native American interns, a single family residential community; and an historic retreat center. 
www.musnaz.org/

Lake Powell - Lake Powell-America's favorite houseboating destination-is like no other place on earth. Lake Powell has spectacular red rock towers, brilliant blue-green water perfect for fishing and boating. 
www.lakepowell.com/

Boat Lake Powell

Walnut Canyon, Wupatki, Montezuma's Castle
These little-known National Monuments may be the best-kept secret in Northern Arizona. All of them feature ancient Native Americans ruins in breathtaking natural settings. Take your pick (and miss the crowds!)

Wupatki (Painted Desert Vistas)

Wupatki National Monument: http://www.nps.gov/wupa/
Walnut Canyon: http://www.nps.gov/waca/ 
Montezuma's Castle: http://www.nps.gov/moca/  

Sedona 
A short drive down a beautiful canyon road lies Sedona and Oak Creek Canyon, home to towering red rocks, multicolored canyons, and Slide Rock, a slick natural water chute. 
http://www.pr.state.az.us/
parkhtml/sliderock.html

Red Rock State Park

The San Francisco Peaks, remnants of an ancient volcano, feature Arizona's highest elevation, Humphreys Peak, which offers hikers a magnificent challenge! The Arizona Snowbowl offers 2,300 feet of vertical drop and 32 trails for all levels of skiers and snow-boarders and, during summer, the Scenic Sky ride up to 11,500 feet and breathtaking views for all.  The Peaks are 20 minutes from Starlight Pines Bed and Breakfast’s driveway!
http://www.arizonasnowbowl.com/index.html

San Francisco Peaks