Some random stuff

Toa Payoh means big swamp, and similarly, paya lebar (paya for swamp).

Map dated 1906 has a large swamp to the northeastern area of Toa Payoh (now Braddell), which encroaches near Shuang Lin monastery (which still stands today)

Grave hill is near where pioneer Seah Eu Chin was buried.

1842 map shows some plantation area (where swamp is cleared), and a larger Toa Payoh area, which stretches from bishan to novena from north to south.

Four 300 metre hills were levelled in 1963 and had their material shifted to fill in the kallang basin. Toa Payoh could formerly be a possible watershed area?

Jurong was a swampland before JTC came in, and Kallang used to have swamps near the mouth of the kallang river along the kallang basin (kolam ayer, near current geylang and kallang bahru)