17 towers visited by Philip Howard

Belem Tower

Big Ben

Burj Al Arab

Burj Khalifa

CN Tower

Dancing House

Eiffel Tower

Empire State Building

Fernsehturm Berlin

Galata Tower

Kuala Lumpur Tower

One World Trade Center

Petronas Towers

Prague Astronomical Clock

Saint Mark's Campanile

Tower of Pisa

Towers of Bologna