A midcentury ranch house hides a literal treasure trove of unique rocks and minerals.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

This rustic cabin, outfitted with gun slits, was once home to John D. Tewksbury, patriarch of the bloodiest family feud in American history.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

The largest natural travertine bridge in the world is nestled in a small canyon in central Arizona.