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