Chelsea, MassachusettsGranite that crumbledA town fire hot enough to crumble granite. What burns that hot?Reports of the 1908 Chelsea fire say buildings of solid granite crumbled and were entirely destroyed.
Photo: TobyJ · CC BY-SA 4.0 · via Wikimedia Commons
Clues Others Missed · Derinkuyu, Turkey
Forgotten underground city
The open question
How do you forget a whole city under your house?
On the record
An 85-metre-deep underground city was forgotten until 1963, when a resident knocked through a basement wall.
Sources
More from Clues Others Missed
Chelsea, MassachusettsGranite that crumbledA town fire hot enough to crumble granite. What burns that hot?Reports of the 1908 Chelsea fire say buildings of solid granite crumbled and were entirely destroyed.
Sydney, AustraliaThe fair palace that burned the land recordsOf all the papers to lose, the ones about who held the land first.When the 1879 Garden Palace burned in 1882 it was being used by government departments, and records of squatting occupation in New South Wales were lost.
SeattleCondemned two years before the fairClose the old level, then hold a world's fair. Same pattern as elsewhere?Seattle condemned the Underground in 1907, two years before the 1909 Alaska-Yukon-Pacific Exposition.