New global phenomenon in which you take photos in hard to reach or forbidden areas.

Bradley Garrett conducting “edgework” as he climbs out on a construction crane, 150 feet above London’s traffic.

“Helen” makes her way through a flooded section of the Paris catacombs, hundreds of miles of tunnels carved through the city’s limestone.

An explorer takes in the view from a telecommunications tower high above the City of Angels.

Garrett looks down on Paris from high atop the 17th century Saint-Sulpice church.

Garrett climbs his way up out of the Fleet chamber, the heart of London’s vast 19th-century brick sewer system, designed after the Great Stink of 1858.

Garrett stands high atop Scotland’s Forth Rail Bridge, which stretches 8296 feet across the firth of Forth, outside Edinburgh.

An explorer inside the ruined interior of the Buzludzha Monument, a derelict Communist-era site in the mountains of Bulgaria.

Marc Explo slips down “Pharaoh’s Revenge” at the shuttered Pharaoh’s Lost Kingdom Waterpark in Redlands, CA. The park has since reopened as Splash Kingdom.

Someone left a door unlocked at the Palais Garnier, the opulent 1875 Paris theater that served as the setting for The Phantom of the Opera.