Although this is the largest of Sicily's islands, its circumference can be driven in an hour. On our tour we started at the Lago di Venere, a lake of volcanic origin with thermal springs draining into it. Next we stopped at another area where the spring water flowed into the sea. There was a small grotto with a place for people to sit and enjoy the thermal springs and look out to sea. We also thrilled to a natural sauna inside a partially enclosed cleft in the hill.
The best views are from the 2743-foot summit of Montagna Grande, the highest point on the island. On clear days you can easily see Africa (which is, after all, closer than Sicily!). The mountain is a natural forest with all kinds of different plants and species.
There are many other things to see and do on Pantelleria, like take a boat ride around the island, or visit the natural marine caves, sun on the calm beaches, snorkel or dive in the coves, or take a walk through the fields of zibibbo grapes. Along the way, most of the houses you'll see blend in with the colors of the island, but there are some buildings that are whitewashed, similar to what you might see in Greece.
Lago di Venere is a lake on the island that can clearly be seen from the air as you take off and land. It is a lovely emerald green from a distance, but when you come up close to it you'll find that it is a volcanic lake. The temperature in certain parts of the lake can go up to 50°C if I recall correctly. You'll have to be a brave soul to sit in that sulphur pit. Although it started getting quite comfortable after a while. The mud in the lake was also supposed to be therapeutic... which was why most visitors (not me though!) slapped themselves with mud, and looked very very funny when the mud dried up. They looked like gingerbread men and women walking around the beach.
The rock formation that leads from the town of Tracino towards the sea looks like an elephant's trunk, and they call it "elephant trunk arch."