• British Museum

• Harrods

• One or more of the old, historic pubs like Ye Olde Cheshire Cheese at 145 Fleet St. in the City or The George at 77 Borough High St. in Southwark

Of these, the most missable is the Changing of the Guard. While it's famous and makes for a nice spectacle, I think it's overrated and it's always crowded, making it hard to get a good spot unless you come quite early.

For a great panoramic view of London, climb the 530 steps to the Golden Gallery at the top of the dome of St. Paul's. The London Eye, a giant Ferris Wheel on the South Bank of the Thames, is a popular attraction and actually gets you higher, but I prefer St. Paul's because for less money you get to see both the cathedral and a fine view. Since St. Paul's is right in the historic center of London, I think the view is actually better than atop the London Eye.

I highly suggest walking along the Thames Path, either on the north or south bank of the river. On a nice day you can get lots of great pictures of the river with historic buildings in the background. It passes many important landmarks such as the Houses of Parliament and St. Paul's, so it's a scenic way to get around.

Even if warm beer isn't your thing, I recommend a trip to a pub because some of them are 300 or more years old and pubs are a cornerstone of English culture. My book lists my favorites, chosen for atmosphere, good beer, historical interest, and lack of televisions. Two of the oldest are mentioned above.

Tours of the Houses of Parliament are generally available only in August and September.

Even though you won't be there long, it's best not to try and see everything on this list. Find some nice spot to sit back and people watch. Pubs are great for this! People tend to be very chatty at the actual bar, less so at the tables.

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Fremont, Calif.: In April 2008, a friend and I are taking a taste of Europe type trip with Trafalgar. We are going to extend in London for a couple of days. I know that it is not much time, but what would you recommend as the "do not miss" sites, and would you recommend a couple of restuarants? We are both ladies in our late 50's with a broad enjoyment of food and sites.

Sean McLachlan: For my top picks in London, see the question above from the person staying for five days. For a two-day stay, I suggest Westminster Abbey, Thames Walk (weather permitting), St. Paul's, Tower of London, and the British Museum.