Manhole cover from Prague, Czech Republic.
Flag of Amsterdam, the Netherlands based on the city’s coat of arms.
Electric company logo from Istanbul, Turkey.
Manhole cover from Barcelona, Spain.
Manhole cover from Tokyo, Japan.
Manhole cover from Barcelona, Spain with the flag mark of the city.
Seljuk pattern from Konya, Turkey.
Manhole covers from Wellington, New Zealand.
Tiles designed by Antoni Gaudí himself for Barcelona, Spain.
