DH & I took DC's to Chislehurst Caves today,
chislehurstcaves.co.uk
Very cheap to get in, £5 Adult, £3 Kids, Under 5's free.
Tours are every hour on the hour.
The kids loved it, Adults are given an Oil lamp to carry which gives a great atmosphere. The tour guide was great and made it very entertaining. Tour lasted 45mins.
This is a fantastic place to bring DC's when they are studying WW1 & WW2 at school, as caves were used as air raid shelters.
Small cafe, very reasonable.
Small gift shop.
Great day out