From the center of the Karakum desert in Asia, a massive crater, dubbed the "Door to Hell," has been spewing flames for more than 40 years.

The ceaseless fire, which can be seen for miles in the distance, is not a natural phenomena. It's the result of a Soviet drilling rig accident in 1971.

Stefan Krasowski, a New York-based business executive who blogs about his worldly travels at Rapid Travel Chai visited the giant underground inferno in 2009.

"Darvaza [Gas Crater] is a monument to Soviet imperial failure, a roiling wound of failed engineering," Krasowski says.

The adventurer was kind of enough to share some photos with us.