This is a great, free and lesser known spot in London. A glass lift takes you up the side of st.Paul's cathedral right out onto the roof terrace of this shopping centre. A great view over London.

Eccentric and surprising house and museum of architect Sir John Soane. Mostly unchanged since his death over 180 years ago, it is full of atmosphere. Also have spotlit, late night openings.  

The fantastical shop front for the children’s literacy charity, the Ministry of Stories – which offers one-to-one writing tuition for local kids. The shop sells ‘Bespoke and Everyday Items for the Living, Dead and Undead’, including Thickest Human Snot, Compacted Earwax, and Tinned Fear. (And all their products make perfect presents for humans.) All proceeds go to the charity.

For its seasonal changes, the rose garden, the Serpentine, the Serpentine gallery, the Summer pavilions, the café etc.

The walk along the South Bank from Westminster to Tower Bridge will take you past a plethora or interesting sights and cultural hotspots. There's always something interesting going on too.