Heliopolis is a fictional location in the Marvel Universe

Marvel Universe

The Marvel Universe is the shared fictional universe where most comic book titles and other media published by Marvel Entertainment take place, including those featuring Marvel's most familiar characters, such as Spider-Man, the Hulk, the X-Men, and the Avengers.The Marvel Universe is further...

. It first appeared in Thor

Thor (Marvel Comics)

Thor is a fictional superhero who appears in publications published by Marvel Comics. The character first appeared in Journey into Mystery #83 and was created by editor-plotter Stan Lee, scripter Larry Lieber, and penciller Jack Kirby....

#240 (Oct 1975), and was created by Roy Thomas

Roy Thomas

Roy William Thomas, Jr. is an American comic book writer and editor, and Stan Lee's first successor as editor-in-chief of Marvel Comics. He is possibly best known for introducing the pulp magazine hero Conan the Barbarian to American comics, with a series that added to the storyline of Robert E...

 and Sal Buscema

Sal Buscema

Silvio "Sal" Buscema is an American comic book artist, primarily for Marvel Comics, where he enjoyed a ten-year run as artist of The Incredible Hulk...

.

Heliopolis is a celestial city in a dimension adjacent to Earth's, founded by the gods

Heliopolitans (comics)

The Heliopolitans are a group of gods in the Marvel Comics universe, based on the gods of Egyptian mythology.-Members:* Atum* Ra* Anubis* Bast* Bes* Geb* Horus* Isis* Khonshu* Neith* Nut* Osiris* Sekhmet* Seth* Thoth-External links:**...

 who were once worshipped in the Egypt

Egypt

Egypt , officially the Arab Republic of Egypt, Arabic: , is a country mainly in North Africa, with the Sinai Peninsula forming a land bridge in Southwest Asia. Egypt is thus a transcontinental country, and a major power in Africa, the Mediterranean Basin, the Middle East and the Muslim world...

ian city of Heliopolis

Heliopolis (ancient)

Heliopolis was one of the oldest cities of ancient Egypt, the capital of the 13th Lower Egyptian nome that was located five miles east of the Nile to the north of the apex of the Nile Delta...

. This godly realm appears to be built upon a small planetary object much like the realm of Asgard

Asgard (comics)

Asgard is a fictional realm within the Marvel Comics universe based on the Asgard of Norse mythology and is home to the Asgardians and other beings of Norse mythology...

, and its passage to earth is a golden bridge through space called the Path of the Gods.