The cryptic cryptoforests of Plymouth and Utrecht

Overgrown residential houses are a special case of cryptoforestry: their status as cryptoforests is cryptic; their function is always (?) the expression of unhappiness and social inconvenience.

'It's so bad, it's worse than the Berlin Wall'

Petr provided the link to the Plymouth ferns above, and they reminded me of these pictures below of a nearly invisible house in Utrecht (Amsterdamsestraatweg).