The collision of a meteorite in what is now Arizona left an indelible mark: Meteor Crater. At nearly the same time, a massive landslide blocked the Colorado River, creating a temporary lake in ...

The hiker injured a knee while on the Crater Lake Trail, a popular hike that starts about 30 minutes from downtown Aspen, ...

Just south of Bend is a charming little destination offering quick access to hiking trails, volcanic views, and campgrounds ...

A massive flood that breached the Greenland ice sheet in 2014 created a huge crater that is now being researched, the ...