Mom and Me: Underground in London

I met my daughter in London for a few days vacation together. She was exhausted from working a double shift before taking the long flight across the ocean. As if that wasn't enough, Immigration had stopped her for two hours for no apparent reason. So we decided we would just take the subway, I mean metro, no I mean underground, no I mean the tube, everywhere we went. And we did.

We only had one issue. We saw a sign for the subway and descended the stairs only to find ourselves going upstairs again. Subway in London simply means a walkway under the street!