Places

Asteroid M
Atlantis
Attlian
Empire State University
Hell's Kitchen
K'un-Lun
Manhattan
Microverse
Morlock Tunnels
Negative Zone
New Attlian
Olympus
Sanctum Sanctorum
The Vault

Africa

Genosha
Wakanda

Antarctica

Savage Land

Asia

Kamar-Taj
Madripoor
Monster Island
Red Room

Europe

England
Germany
Latveria
Tønsberg, Norway

North America

Baxter Building
Boston, Massachusetts
New Mexico
New Orleans, Louisana
SHIELD Triskelion
Xavier's School for the Gifted
Yancy Street

Outer Space

Blue Side of the Moon
Hala
Sakaar