Somerset House lays on a couple of free guided tours every week, which are well worth doing.
This short one hour tour will show you some of the graceful staircases in the West Wing and the atmospheric Deadhouse, and introduce you to some of the Tudor intrigues that took place in the Strand mansion.
You'll also learn about about British naval power, see some interesting scientific curiosities, and get a taste of the extravagant entertainments laid on during the Georgian period.
If you're more interested in the personalities then you might like to try the Old Palace Tour of Somerset House instead, which concentrates on the building's Royal connections.
Of Gods, Rainbows & Omissions — Athi-Patra Ruga – 4 Oct 2018 to 6 Jan 2019 – The first major solo exhibition in the UK by South African artist Athi-Patra Ruga will take place at Somerset House.
Old Palace Tour at Somerset House – Every Tue – The Old Palace Tour will introduce you to three Stuart queens who had an association with the old buildings at Somerset House
Good Grief, Charlie Brown! – 25 Oct 2018 to 3 Mar 2019 – Fans of Charles M Schulz much-loved Peanuts cartoon will want to see the Charlie Brown and Snoopy exhibition at Somerset House.
Skate! — Christmas ice rink at Somerset House – 14 Nov 2018 to 13 Jan 2019 – Somerset House has got the prettiest rink in London, with a huge Christmas tree and festive shopping arcade
The Original Tour — Open-top sightseeing bus – Every day – The Original Tour is one of London's most popular sightseeing buses, and it's also a great way to travel around the capital.
London Bus Tour — open-top sightseeing bus – Every day – This traditional open-top bus tour will take in all the best landmarks and attractions, with a free river cruise and guided walk.
TRS river cruise, from Big Ben to Greenwich – Every day – Spend a leisurely afternoon on a TRS river cruise from Big Ben to Greenwich, and see some of the sights along the river.
Look for more guided tours in November
Here are some more free events in London if you want a cheap day out
Disclaimer: Event details can change at short notice and you should reconfirm everything before making plans