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855 spans is about one-and-one-fourth times as tall as Blackpool Tower
In other words, it's 1.24 times the height of Blackpool Tower, and the height of Blackpool Tower is 0.806 times that amount.
(Blackpool, Lancashire, England, United Kingdom) (height to peak)
Blackpool Tower, part of an entertainment complex in Blackpool, Lancashire, England, measures 691 spans to its peak. Under ideal conditions, visitors to the highest accessible point of the tower can see as far as the Isle of Man — 420,000 spans to the northwest.
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