下町[shitamachi] low-lying part of a city (usu. containing shops, factories, etc.)
下町風[shitamachifuu] downtown style
町角[machikado] street corner
漁師町[ryoushimachi] fishing village
港町[minatomachi] port city

市町[shichou] cities and towns
市町村[shichouson] cities, towns and villages
小町[komachi] a belle
城下町[joukamachi] castle town
町屋[chouka] townhouse (i.e. house in the middle of a town)

峡谷[kyoukoku] glen
溪谷[keikoku] valley
千仭の谷[senjinnotani] bottomless ravine
谷あい[taniai] valley
谷川[tanigawa] mountain stream

谷底[tanisoko] bottom of valley or ravine
幽谷[yuukoku] deep ravine
蟀谷[komekami] temple (of the forehead)
谷まる[kiwamaru] to terminate