While Tower Bridge‘s more popular cousin, the London Bridge, has been preserved in one of the Western world’s most famous nursery rhymes, the image of the two stone towers anchoring blue suspension cables is far more iconic. Right in the hub of some of the city’s most famous landmarks, Tower Bridge is almost impossible to miss during your family day. Check the bridge’s website beforehand for bridge raising times, then time your visit so your kids can watch the massive spans lifting up to allow passing ships through. When it’s connected again, stroll across on the wide pedestrian avenue on the far edge as you arrive at the museums located in the foot of each tower. After a brief elevator ride to the top, gather the family around the large windows in the stone walls of the tower. The Thames flows lazily below, ferrying ships and barges in and out of view as you continue through the displays and down into the belly of the bridge’s lifting mechanisms. Both you and the kids will be delighted by the hulking Victorian-era machinery that powers this bridge’s dynamic roadways, touching the rivets of large steam boilers and watching as the lime green cogs of the engine turn slowly. As you continue on to the sites on either side of the bridge, take some time to reminisce with your kids about the days when great machinery powered this international empire.