What's the name of this show?

Question

It was on in the 90's. There were two kids (a boy and a girl) and a dad. They lived in a treehouse in a different world with dinosaurs. I think they fell through a crack or canyon or something that opened up in an earthquake. I want to say there was another girl there later who was dressed like a cave woman... Thanks in advance!

Answer 1

was it land of the lost?

Answer 2

Land of the Lost.  

Answer 3

Land of the Lost!