The replica ~17th Century Spanish Galleon 'Galeón Andalucía' has been moored at St Katharine Docks since the last week of September. It was due to leave tomorrow but it's staying another week (hooray!). St Kat's is next to the Tower of London / Tower Bridge.
If you want to board the ship you can. I've not been on it yet but enjoyed a free gawp from land, it's really beautiful.
Children (5-10 years old, under 5 free): £6
Adults (> 10 years old): £12
Families (2 adults and up to 3 children aged 5-10): £30
Wear comfy flat good-grip shoes if you're planning on boarding as the gangway is quite steep (but looks very sturdy and is supported in the middle by being attached to one of the masts).
• Tickets: you can book in advance for hourly slots, or buy on the day
• Location: if you don't know St Katharine Docks / St Kat's Marina then I made this annotated map on Google MyMaps which might help, plus a couple of step-free routes. I've assumed that you're going to arrive at Tower Bridge Pier via a ferry :) The galleon is located at ///What3Words:tubes.credit.admit
• Tall Ships Experience: the next journey from London to France is sold out (I think there was only one space on board) but other journeys appear, several hundred to a few thousand euros. You can also volunteer for several months on board. Both schemes involving helping out and being part of the crew.
St Kat's is lovely anyway and definitely worth a visit. The royal barge Gloriana is also moored there. In Summer and Winter St Kat's often has 'open air' cinema on a floating (moored!) pontoon which is rather nice.
Pretty much every time I start a new thread and include links my account gets suspended (!) so to show I come in peace here are all my previous posts :-)
https://www.mumsnet.com/search/advanced#/?username=jobrodie&type=all&topics=&page=1&sort=_search
Jo