The Collector's Museum is a museum of all the Collector's collections. It is found on the spaceport of Knowhere.
Sif and Volstagg arrives at the museum, they are come to deliver the Aether ko keep it safe, Tivan ask why they don't retain the Aether, Volstagg replied that's very dangerous to have two Infinity Stones in one place. The Asgardians leave and the Collector says: "One down five to go" implying that his mission is to take all Infinity Stones.
The Guardians come to the museum to sell the Orb to Tivan. Rocket tired of Collector' stories asks Tivan to pay them, suddenly Carina grabs the Orb causing the destruction of the museum. In a post-credits scene, Tivan is in his destroyed museum drinking with Howard the Duck.