There is so much to do in the Maremma region of Italy! Check out this article from 2019, which has a ton of suggestions, in addition to some of ours below:
https://www.thewinechef.com/blog/meet-maremma-where-to-eat-drink-and-play
We are in a part of Tuscany only 30 mins from the coast. There are beautiful sandy beaches running from Marina di Grosseto to Castiglione della Pescaia, as well as around Punta Ala. This photo is from our trip to the region in January, and even in winter, the beaches are beautiful. The closer you get to Castiglione della Pescaia, the more built up it gets, but that affords you a boardwalk and restaurants right on the beach.
It's Tuscany! There are so many vineyards to choose from, so these are just a few of the ones in the Maremma. For those of you with a car and some time, there are dozens more to choose from as you get closer to Montalcino (about an hour east of La Pescaia).
Totally organic - great selection of white, rose and reds.
At the end of a long and bumpy road - but the building was designed by Renzo Piano (who also helped design The Pompidou Center in Paris, the Shard in London and the Whitney Museum in NYC). It has an amazing roof deck and the cellar is incredible.
Beautiful winery and farm shop located only 10-15 mins from La Pescaia.
There are a ton of things to do in the Maremma region - visit https://www.visittuscany.com/en for some inspiration. But two to highlight would be:
Also known as Saturnia. An amazing set of hot spring pools cascading down to create a waterfall effect. The water is a constant 37C (98.6F for those on the Imperial scale). 45 miles / 1h 15m from La Pescaia.
Very cool sculpture garden about an hour south of La Pescaia, close to the Monte Argentario peninsula.