neolithic orkney [1999]

nessebar [1983]

nesvizh radziwill family complex [2005]

new lanark [2001]

ngorongoro [1979]

niah national park [2024]

ningaloo coast [2011]

niokolo koba [1981]

2007

noel kempff mercado [2000]

nord pas de calais mining basin [2012]

novgorod [1992]

nyungwe national park [2023]

oaxaca and monte albán [1987]

odesa [2023]

odzala kokoua [2023]

ogasawara islands [2011]

okapi wildlife reserve [1996]

1997

okavango delta [2014]

old rauma [1991]

olinda [1982]

olympia [1989]

ombilin coal mine [2019]

orkhon valley [2004]

osun osogbo [2005]

painted churches in the troodos region [1985]