The PlayCanvas team’s open-source SuperSplat is really great—you can visit the lakeside of Daming Lake, where Xia Yuhe often goes, without even leaving home.

You can see outer space above and marine life below. Most importantly, you can also take a high-definition virtual tour of museums. The world’s mountains, rivers, and lakes are no problem either.
It supports scanning a house with your phone and then enjoying real-time roaming in the browser.