ROBERT SIEGEL, host: Four Corners, USA is the only place in the United States where four states meet: Arizona, New Mexico, Utah and Colorado. There's a monument there.

SALT LAKE CITY — Tourists who think they’re putting a hand or foot in each of four states at the Four Corners are apparently missing the mark — by about 2½ miles. National Geodeti… ...

View Four Corners Monument in a larger map. The “Four Corners,” where Arizona, Utah, Colorado, and New Mexico meet, is the only quadripoint of its kind in the United States.

“The Four Corners Region: Where Colorado, Utah, Arizona & New Mexico Meet” ($18.95, The Countryman Press) makes it hard not to hop in a car and head straight for the starkly beautiful region ...

A methane hot spot has been detected over the Four Corners region of the U.S. Southwest. (Yellow and red are higher than average; purple and blue are below average.) (Image credit: NASA/JPL ...