Why it’s so awesome: Japanese architecture and their sense of aesthetics are different from anywhere else in the world and they’re both absolutely stunning. The Imperial Palace is a good example of this sense of grace and beauty. And the grounds are no different. Japanese gardens are probably the most stunning in the world, and the Imperial Palace is surrounded by some of the best examples of these gardens that you’ll ever see. You won’t regret adding them to your Tokyo itinerary!
What to do there: This is an important historical site and it’s also the home of the imperial family today, so you’ll need to apply several weeks in advance to get admittance to the site. And you probably won’t be able to go inside the building at all, as these passes are even rarer. But the grounds here are stunning, particularly the East Garden, which is a lush, natural space that’s designed in the traditional Japanese style.
Source: https://www.thebrokebackpacker.com/best-places-to-visit-in-tokyo/