He dug a ditch in the garden.

The Mariana Trench is the deepest part of the earth.

The gutter is clogged, so it needs to be repaired immediately.

There is a large culvert under this road.

We visited the moated burial mound and learned about the lives of ancient people.

The Japanese night heron was quietly targeting fish in the pond.

This square moated burial is one of the important archaeological sites of ancient Japan.

It's rare to find a Malayan night heron in the park.