Thames River

One of my favorite things in London was the Thames River.  I used the boats on the river the way I used the Underground, to get from one place to another.  I like being on the water.  I took this picture from a boat right after one of the many rains.  The rainbow was an extra.  The boats are also a good way to see the city.
I also enjoyed a very pleasant walkway along the river one afternoon between rains.  There were benches, every so often where people could sit and just watch the boats and the river go by.
I walked as much as I could.  The City presumes that you will walk.  They have signs here and there indicating how many minutes it would take to walk to various sites, like Westminster Abby and the Tower of London.  It rained a lot the week I was in London.  My rainjacket  had a hood so I just kept on going, the way the Londoners did.  A few times the rain was so hard that I ducked into the Underground and used it to get where I wanted to go.
Subway in England means a tunnel under a street.  They call the trains the Underground or Tube.  It didn't take long to figure out the map and know where to change trains.  An excellent system.