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