<h3>Today we first went on a boat trip down the Thames. All of us felt excited about that. Some of us bought some snacks on the boat. But the things there were really expensive!</h3> <h3>We could see many famous buildings along the river bank，such as the Shard.</h3> <h3>With our guide's help, we succeeded in telling apart the difference between the London Bridge and the Tower Bridge. We were very surprised becase we didn't know before.</h3> <h3>The Tower Bridge was so beautiful. We took some photos there.</h3> <h3>Then we went to the Royal Greenwich Observatory. It has been a museum. We learned some history there.</h3> <h3>We saw the prime maridian there. And we all had a cheerful and fruitful day.</h3>