Oregon is a state in the Northwest region of the US.

Orgrimmar is the orcish capital city

A TV Tower in Shanghai.

Orkney is an archipelago in northern Scotland and is the main location of Vertigo's "Northlanders" and "Crossed: Wish You Were Here".

A city in Florida famous for Disney World.

Orollan is a hidden city of Inhumans established by the Lor who separated from their brethren in Attilan.

A time-locked island where the Childminder kept the kidnapped sidekicks.

World-city created by some philosophers as alternative to our own world which was too "materialistic" for them.

G.O.D. Satellite command center.

Home of the Orishas.

Third largest city in Japan. Capital of the Osaka Prefecture.

A prefecture in Japan. The capital is the city of Osaka.

Oscorp is a corporation run by Norman Osborn, also known as the Green Goblin. It was Oscorp's experiments on a spider that gave Peter Parker his arachnid abilities.

Oshawa is a city in Ontario, Canada, on the Lake Ontario shoreline.

Capital of Norway.

Ossus is a planet in the Star Wars comic books.

A Polish city infamous for being the location of Auschwitz.

Alternate Earth where two different versions of Supreme once met. Later the residence of Lady Supreme.

Magical realm

Otherspace is a dimension of untapped energy.

Annwn is the afterlife world in Welsh mythology and is ruled by the Celtic god Arawn.

Capital city of Canada.

The Australian Outback.

A shared universe with occult circumstances by Mike Mignola with no connection to his previously created Hellboy universe.

Realm of Oblivion, which is devoid of any matter or energy.

Outland is the remnants of the red world Draenor, the homeworld of the orcs and refuge of the draenei.

The Outside refers to regions completely outside the Marvel Multiverse and beyond Eternity's influence.

Both the main setting and the true main villain in Stephen King's 1977 novel, The Shining. While at first it seems like a large haunted hotel, in reality, the hotel is a sentient being with a rather sadistic personality.

The Realm of Abstract Entities. Point above and apart from all other realities. Sentience of the Universe (Sixth Cosmos) created the Overspace.

The Overvoid is the home realm of the Egyptian Gods in the Marvel Universe.

Owl's fortress initially was located outside Hudson River but finally he has built it in a strange volcanic isle, hundred of miles from nowhere.

The secret headquarters of the original Nite Owl, Hollis Mason.

Town in England.

A prestigious collegiate research university located in the city of Oxford in England

The Marvelous Land of Oz was a magical realm where Dorothy landed after her farm house was swept up by a tornado. Disconnected from Earth, this magical matriarchy is filled with talking animals, witches, living teddy bears and china dolls, and many other amazing inhabitants.