INSIDE THERE IS . . .

. . .  wonder if the can guess what it is ?
The answer is below and in the extra. Still buzzing after that Grand Blip Meet on Saturday. As for my Blip yesterday . . . the sad news is that the signs just ran out. More investigation required . . . perhaps I should take Sherlock with me next time.
Answer to today :

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This is the former Flamborough Head Lighthouse, with an octagonal tower constructed of coursed chalk rubble with stone dressings. It was built in 1674 as a business venture by Sir John Clayton, but never used.

The cliffs around the headland have long been recognised as dangerous for passing shipping.