Jeff Bezos will embark on the most perilous flight of his life in a few short weeks, one that will take him 62 miles above Earth and nearly to the edge of space.

Due to his excursions to the bottom of caves or the open ocean, the soon-to-be-former CEO of Amazon is somewhat of an adventurer. He isn’t particularly unique among his peers, though; in fact, billionaires all over the world appear to share a passion for extreme experiences.

These 4 businesses are leading the way in “space vacations,” offering everything from orbital hotels to huge balloon flights.

And Bezos isn’t the only businessperson who is enthusiastic about space exploration. Paul Allen, Sergey Brin, Richard Branson, and Elon Musk have all expressed interest in leaving Earth.

The world’s wealthiest individuals seem to be preoccupied with space, but there are numerous other billionaires who have their own extreme interests.

Jeff Bezos has used his substantial financial resources to support risky journeys, including space travel.