Sentence:  But the granddaddy of all hoards could be resting at the bottom of a 200- foot shaft on Oak Island, off Nova Scotia. This so-called <WSD>Money Pit</WSD> has exercised a moth-to-flame attractive power over investors since it was discovered in 1795. 
Meaning of the word marked with <WSD> tags:  Long-standing nickname of a complicated, seemingly man-made excavation on Oak Island in Nova Scotia, Canada, rumored to contain pirate treasure and which has been repeatedly and unsuccessfully probed at great expense.