Boston ivy, Parthenocissus tricuspidata, close-up detail of a single fallen red leaf on grey stone in the autumn.

USA, Washington DC, Cathedral of St Matthew the Apostle, Mosaics above the main altar and dome interior.

USA, Washington DC, Capitol Hill, Library of Congress, The Great Hall, Detail of the colourful ceiling.

USA, Washington DC, Capitol Hill, Library of Congress, The Great Hall, Detail of the colourful ceiling.

USA, Washington DC, Capitol Hill, Library of Congress, The Great Hall, Detail of the colourful ceiling.

USA, Washington DC, Capitol Hill, Library of Congress, The Great Hall, Detail of the colourful ceiling.

USA, Washington DC, Capitol Hill, Library of Congress, The Great Hall, Detail of the colourful ceiling.

Germany, Berlin, The East Side Gallery, a 1.3 km long section of the Berlin Wall, Another colourful section.

Spain, Catalunya, Barcelona, Antoni Gaudi's Casa Batllo building, colourful chimney pots on the roof terrace with the four armed cross also inclluded.

Spain, Catalunya, Barcelona, Antoni Gaudi's Casa Batllo building, colourful chimney pots on the roof terrace.

Spain, Catalunya, Barcelona, Antoni Gaudi's Casa Batllo building, colourful chimney pots on the roof terrace.

Spain, Catalunya, Barcelona, Antoni Gaudi's Casa Batllo building, colourful chimney pots on the roof terrace.