green rail corridor at bukit gombak

growth housing scrubland flat bukit landscape asia wilderness habitat nature woods wild shrubs jungle lush edge open light ecosystem west hdb evergreen rail buildings meadow trail grass woodlands panjang tropical trees corridor rewilding track green singapore regenerating land ground gombak natural elephant greenery earth grasses sunset spontaneous tall vegetation secondary albizia succession soil space dense long sanctuary development rural grassland rainforest path public estate linear thick