Harrods is iconic, the ultimate in luxuary even if you are just going to look.

On seven floors you can get ahead of the other 15 million visitors that visit the store annually by checking out their intercative store guide before you leave home.

To get there from the Americana; take the 74 bus from outside Baker Street underground station.
When you use the crossing at Baker Street the stop is to the left.
The bus stops outside Harrods