I was surprised to see so many people at Greenwich as I thought it was only going to be a few hardy science enthusiasts coming to visit the observatory.  But, as we learned, there is so much more and visiting makes for a pleasant day out from central London. We took the Uber Boats down the Thames to Greenwich.  The rain dried up for a bit, the green park was nice for walking through, and we happily found much more than the Royal Observatory there.  At the observatory, we took the obligatory "two hemispheres" photo, but didn't enter the observatory proper due to the steep admission fee given our time constraints. Still it was nice to see such a historic place. We did enter the (free) National Maritime Museum which now features a giant ship-in-a-bottle model of Nelson's HMS Victory at its entrance. We found the museum very interesting and we admired the intricate ship models, learned a little history, and sat in on a nice lecture about Peter the Great's visit.  We also walked through the old Naval College's Chapel of St. Peter and St. Paul and were tempted by the Painted Hall, but again, the high admission price put us off when we were planning to see a lot of other art at the National Gallery.  The Cutty Sark, as an icon of Maritime Greenwich was also nice to see. After our visit, the long line to get back into an Uber Boat had us rethinking taking the underground, but the line wasn't as long as it might have been, so we only had to wait about 20 minutes.  All in all, a great place to spend a really pleasant afternoon, and a different aspect of greater London to appreciate.  I'm happy to have visited the center of so much science and commerce.