Keep an eye out for exhibits at the Waterfire Arts Center. Most are free (donations accepted) or you can support them by buying merch in the gift shop.

I went to both the earth and the moon exhibits, which were very cool. Here's the description of the Earth exhibit.

The earth sculpture was compiled by real photos, so there's no markings and lots of clouds.

https://waterfire.org/events/planet-earth-the-environment-and-our-future/