Brobdingnag

Brobdingnag is a planet populated by aliens gigantic in comparison to even Transformers. The civilization there appears to be only a few decades advanced from 20th century Earth, though their architecture is based on round buildings rather than square ones.

The Transformers cartoon
A space bridge accident resulted in a small number of Autobots and Decepticons being teleported through space to land up on Brobdingnag. More precisely, they arrived in the bedroom of a young boy named Aron, and immediately discovered that the gigantic scale of the planet and everything on it made it a dangerous environment for the comparatively diminutive Transformers. When they were discovered by Aron's parents, they were taken to the local authorities who were mostly interested in taking them apart to see how they ticked. Aron helped the Autobots escape and after a trip through the settlement's sewerage system, they returned to Aron's dwelling, where the Decepticons hijacked Perceptor's first method of getting off planet, forcing him to modify Aron's toy spaceship so the Autobots could start heading for Earth.

The AllSpark Almanac
Brobdingnag was part of the Quintesson Pan Galactic Co-Prosperity Sphere. Aron lived there.