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