18 towers visited by Mike Sweeting
Big Ben
Chrysler Building
Dubai Marina
Eiffel Tower
Fernsehturm Berlin
Flatiron Building
Galata Tower
Montparnasse
Petronas Towers
Po-i-Kalyan
Powder Tower
Prague Astronomical Clock
Rundetaarn
Saint Mark's Campanile
The Shard
Torre del Gardello
