Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Chankillo Archaeoastronomical Complex' has mentioned 'Observatory' in the following places:
Occurrence Sentence Text Source
The ruins include the hilltop Chankillo fort, the nearby Thirteen Towers solar observatory, and residential and gathering areas.
The Thirteen Towers have been interpreted as an astronomical observatory built in the 4th century BC.
Contents 1 The Thirteen Towers solar observatory 2 See also 3 References 4 External links
The Thirteen Towers solar observatory[edit]
[11] The Thirteen Towers of Chankillo could be the earliest known observatory in the Americas.