Geographic Names
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- Øresund
- Organization of American States
- Organization of Petroleum Exporting Countries
- Organ Pipe Cactus National Monument
- Orhon
- Orient Point
- Orillia
- Orinoco
- Orissa
- Orizaba
- Orkhon
- Orkneyan
- Orkney Islands
- Orlando
- Orland Park
- Orléanais
- Orléans
- Orly
- Ormoc Bay
- Ormond Beach
- Ormuz
- Orne
- Orocovis
- Orontes
- Oro Valley
- Oroville Dam
- Orpington
- Orrefors
- Orsk
- Ortegal, Cape
- Ortler
- Ortles
- Orūmīyeh
- Oruro
- Orvieto
- Oryol
- Osage
- Osaka
- Osaka Bay
- Osasco
- Osh
- Oshawa
- Oshkosh
- Osijek
- Oslo
- Oslo Fjord
- Osmaniye
- Osnabrück
- Osorno
- Ossa, Mount
- Ossetia
- Ossining
- Ostend
- Ostende
- Österreich
- Ostia
- Ostrasia
- Ostrava
- Osumi Islands
- Oswego
- Oświęcim
- Otago Harbour
- Otranto
- Otranto, Strait of
- Otsego Lake
- Ottawa
- Ottoman Empire
- Ottumwa
- Ouachita
- Ouachita Mountains
- Ouagadougou
- Ouargla
- Oubangui
- Oubangui-Chari
- Oudenaarde
- Oudh
- Oudjda
- Oudtshoorn
- Ouessant, Île d'
- Oujda
- Oulu
- Ourense
- Ouro Prêto
- Ourthe
- Ouse
- Outer Banks
- Outer Hebrides
- Outer Mongolia
- Out Islands
- Ovamboland
- Overijssel
- Overland Park
- Oviedo
- Owasco Lake
- Owen Falls
- Owen Falls Dam
- Owens
- Owensboro
- Owens Lake
- Owen Stanley Range
- Owyhee
- Oxford
- Oxfordian
- Oxfordshire
- Oxnard
- Oxonia
- Oxus
- Oxyrhynchus
- Oyrot
- Oyster Bay
- Ozarker
- Ozarkian
- Ozark Mountains
- Ozark Plateau
- Ozarks, Lake of the
- Pacaraima Mountains
- Pachuca
- Pacifica
- Pacific Crest National Scenic Trail
- Pacific Crest Trail
- Pacific Islands, Trust Territory of the
- Pacific Northwest
- Pacific Ocean
- Pacific Rim
- Pacific Rim National Park Reserve
- Pactolus
- Padang
- Paddington
- Padova
- Padre Island
- Padua
- Paduan
- Paducah
- Padus
- Paestum
- Pago Pago
- Pahang
- Painted Desert
- Paisley
- Pakanbaru
- Pakistan
- Pakistani
- Palaestina
- Palatinate
- Palatine
- Palau
- Palauan
- Palawan
- Palembang
- Palencia
- Palenque
- Palermitan
- Palermo
- Palestine
- Palestinian
- Palikir
- Palisades
- Palk Strait
- Palma
- Palma de Mallorca
- Palmas
- Palmas, Cape
- Palm Bay
- Palm Beach County
- Palm Beach Gardens
- Palm Coast
- Palmdale
- Palm Desert
- Palmer Archipelago
- Palmer Land
- Palmer Peninsula
- Palmerston
- Palmerston North
- Palm Springs
- Palmyra
- Palmyra Atoll
- Palmyrene
- Palo Alto
- Palomar Mountain
- Palos
- Palos de la Frontera
- Palouse
- Palouse Hills
- Pamir
- Pamirs
- Pamlico
- Pamlico Sound
- Pampas
- Pampeluna
- Pamphylia
- Pamphylian
- Pamplona
- Panaji
- Panama
- Panamá
- Panama, Gulf of
- Panama, Isthmus of
- Panama Canal Zone
- Panama City
- Panamanian
- Pan-American Highway
- Panamint Mountains
- Panay
- Pangaea
- Pangea
- Pang-pu
- Panhormus
- Panipat
- Panjab
- Panjnad
- Pankow
- Panmunjeom
- Panmunjom
- Pannonia
- Panormus
- Pantanal
- Pantar
- Pantelleria
- Pánuco
- Pao-chi
- Pão de Açúcar
- Paoking
- Pao-ting
- Pao-t'ou
- Papal States
- Papeete
- Paphlagonia
- Paphlagonian
- Paphos
- Papua
- Papua, Gulf of
- Papua New Guinea
- Papua New Guinean
- Pará
- Paracel Islands
- Paradise
- Paraguay
- Paraguayan
- Paraíba
- Paraíba do Norte
- Paraíba do Sul
- Paramaribo
- Paramount
- Paramus
- Paraná
- Paranahiba
- Paranaíba
- Parañaque
- Parashant National Monument
- Pardubice
- Paria, Gulf of
- Paria Peninsula
- Paricutín
- Parida, La
- Paris
- Parisian
- Parker
- Parkersburg
- Park Forest
- Park Ridge
- Park Slope
- Parma
- Parnahyba
- Parnaíba
- Parnassós
- Parnassus
- Páros
- Parramatta
- Parramatta River
- Parris Island
- Parry Islands
- Parsnip
- Parthia
- Pasadena
- Pasadenan
- Pasargadae
- Pasay
- Pascagoula
- Pasco
- Pas de Calais
- Pasig
- Paso Robles
- Passaic
- Passamaquoddy Bay
- Passchendaele
- Passendale
- Passero, Cape
- Pass of Llanberis
- Pass of Roncesvalles
- Passy
- Pastaza
- Patagonia
- Patagonian
- Patan
- Patapsco
- Paterson
- Pathein
- Patiala
- Patmos
- Patna