It's time to travel again

The apocalyptic icescapes of this weekend are a reminder to pack your bags

Our world froze this week. It was spectacular.

A powerful polar vortex brought record-low temperatures to much of the United States. Denver saw its coldest air in a generation on Thursday when temperatures plunged to minus 24 degrees, the coldest since 1990. 

In C​heyenne, Wyoming, temperatures fell by 40 degrees in a half-hour, shattering the city's reco…