22 towers visited by Martin MacLeod

30 St Mary Axe

Belfry of Bruges

Bell Tower

5

Big Ben

Burj Khalifa

Clocktower

3

Colonius

Eiffel Tower

Empire State Building

Fernsehturm Berlin

Galata Tower

Kuala Lumpur Tower

Latvian Academy of Sciences

7

Main Tower

Montparnasse

One World Trade Center

Petronas Towers

Space Needle

Supertree Grove

6

Torre Branca

Tower of Pisa

White Tower of Thessaloniki