Answer: horizons

AnswerCrossword Clue
HORIZONSRanges of perception.
HORIZONSSkylines.
HORIZONSSunrise and sunset locales
HORIZONSThings in view
horizonsThe circular boundary of the part of the earth's surface visible from a particular point, ignoring irregularities and obstructions
horizonsThe line at which the earth's surface and the sky appear to meet
horizonsA great circle of the celestial sphere, the plane of which passes through the center of the earth and is parallel to that of the apparent horizon of a place
horizonsA layer of soil or rock, or a set of strata, with particular characteristics
horizonsA level of an excavated site representing a particular period
horizonsHORIZON, the line where earth and sky seem to meet
horizonsThe limit of a person's mental perception, experience, or interest