Moscow and London.

I am from Moscow and I like it. In Moscow are many different monuments, museums and galleries. Kremlin, Tretikovsjaya gallery, Bolshy Theatre, Hram Christa Spasitelya and many other sights.

In London are British Museum, Buckingham Palace, Big Ban and Westminster Abbey.

London is more cleaner than Moscow I think, and more interesting for me, because it's my first visiting in London. Moscow and London are two cities in Europe, which have more then 10 millions people. Moscow bigger than London and they have two popular undergrounds.