Here is the outside of Harrods department store. This place is like six stories, plus a basement. It's really like a mall, except instead of lots of small independently-operated stores inside, it's all Harrods.
They have about 50 different rooms, which are really different stores...one room will have gifts and souvenirs, one will have perfume, another room sells jewelry, another room sells books, another games, another lingerie... Another room is a butcher shop. Another room has pizza and Krispy Kreme. Another room is a bakery. But it's all Harrods.
There are about ten entrances. The whole store takes up its own city block. We didn't see it all, because if we had we would've had to skip, y'know, the rest of London. Do you understand the point I am making. It's a big store. It makes Walmart look like a Saturday-only flea market in a gravel parking lot. Of course, you can actually afford things in Walmart.