Then to the Tate Modern, which lies along the Thames. It had all the usual things that modern art museums have. A bit of Picasso, some Klee, the odd Mondrian or two, some elaborate welded machines of bizarre but undefined function, fluorescent lighting tubes piercing futon mattresses, rooms full of precise and gratuitous mathematically-oriented scribblings... in other words, all my favorite things.
The Tate Modern is built in a former power plant. A power plant. Oh my goodness it was so cool.
The Millennium Bridge was built as the only pedestrian-only bridge across the Thames ever built. Unfortunately, it proved to be quite wobbly when it opened. Something about its resonant frequency being close to that of humans walking (often associated with pedestrians, as it turns out). And once started, people, apparently, naturally fell into lockstep with each other, exacerbating the problem.
I know what you're thinking: "This wouldn't be a problem if it was a bicycle only bridge, now would it?"
Well, instead, they reinforced it a bit, and it recently reopened. My UK coworkers were terrified that I'd walked across it. I guess they saw the wobbling pictures. I didn't.