What is this?
beaver dam
nest
arch
tree trunk
What is this?
cave
pillar
arch
bridge
What is this?
skeleton
nest
cave
eggshell ( shell )
What is this?
beaver dam
cave
arch
nest
What is this?
skeleton
tree trunk
shell
ladder
What is this?
castle
basket
ladder
stairs
What is this?
arch
castle
bridge
ladder
What are these?
bridge
ladder
pillar
stairs
What is this?
castle
stairs
pillar (column)
arch
What is this?
arch
bridge
castle
pillar (column)
What is this?
arch
bridge
castle
house
What is this?
tree trunk
tree house
tree branch
tree root
What is this?
cave
shell
eggshell
nest
What is this?
book
basket
box
bag
What is this?
bag
basket
box
book
What is this?
pillar (column)
cave
tent
arch
