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Black Rock Sands Morfa Bychan has a beach known as Black Rock Sands ( ) which stretches for two miles from the eastern end of the National Trust 's Ynys Cyngar on the Afon Glaslyn [ River Glaslyn ] estuary along Tremadog Bay to Criccieth beach which is accessible at low tide .
 Criccieth
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Criccieth