I just got back from my first trip to the UK and Ireland. It was an awesome experience, probably the best trip I have ever taken. That said, while I was walking along the street in Edinburgh, I saw a sign for a Men's Toilet. It was underground.

Does everybody know to avoid these? As a tourist, it seemed like a reasonable place to use a toilet. Am I just clueless or do a lot of tourists end up stumbling into these?