Biosphere 2

When Is the Best Time

The best time to visit is summer, despite being the desert, this will be the least expensive time to travel, and you will encounter fewer tourists.

Is Biosphere 2 Worth It?

Biosphere 2 is worth seeing and worth drive and time for most adults. The entrance fee is reasonable, and the science experiments are truly fascinating: The largest indoor ocean with a coral reef, a fog desert, and the largest indoor rain forest.

It may even be worth it for kids if there is enough interest in scientific topics. The tour duration is definitely suitable for the younger ones.

Most visitors say that even the advanced tours are worth it since they provide additional and intriguing insight into what it was like to live there for two years. The tour guides are extremely knowledgeable and enthusiastic.

The only small downside is the many stairs to walk and that the many interesting parts are not accessible by wheelchair.

How to Get There?

It’s only a 45 minutes drive from Tucson Arizona: Google Maps Route – Tucson > Biosphere 2 Your best choice is to stay in Tucson for one night before heading to the site.


This isn’t just the set for the corny, 1996 movie,  Bio-Dome. This is one of the world’s most fascinating facilities dedicated to, “The research and understanding of global scientific issues” … as their website describes. Biosphere 2 was named giving a head nod to Earth (Biosphere 1 so to speak).

Personally, the most interesting aspect of exploring the Biosphere was witnessing the two massive ‘lungs’ connected via underground air tunnels used to maintain the pressure gradient inside Biosphere 2. It is crucial  for this structure to have these two variable expansion chambers.

Tickets are about $20 with tours daily, but make sure to check out their website ahead of time for exact info.

And since the days are scorchers, the Biosphere will allow for comfortable indoor exploration, then when the sun sets, be amazed by Tuscon’s famously starry skies.

If you head to Oracle State Park you can get to the American Avenue trailhead parking lot that is open seven-days-a-week to access the National Scenic Arizona Trail, this accommodates after hours use by stargazers.