24 towers visited by Steve Stewart

30 St Mary Axe

Agbar Tower

Big Ben

Burj Al Arab

Burj Khalifa

Chrysler Building

CN Tower

Dubai Marina

Eiffel Tower

Empire State Building

Flatiron Building

Galata Tower

Old Town Hall

One World Trade Center

Powder Tower

Prague Astronomical Clock

Saint Mark's Campanile

Space Needle

The Shard

Tokyo Tower

Torre del Oro

Torre dos Clérigos

Torre Monumental

Tower of Pisa