Evening Standard: "Urban explorers break into landmarks"

Link to Evening Standard

"More than 300 of the capital's most famous landmarks are being broken into at night by groups of 'urban explorers'. 

"London is at the epicentre of the rapidly growing global movement, described as the practice of entering unseen or off-limits areas for the thrill of discovery."

---

Link to "Jolly Japes! Exploring London's Secret Underground Railway".