Today, you can rent a modern trullo. For more information, go here and here.
Here's a street in Alberobello, with trulli on both sides.
Here's a house made of at least two trullo units.
One trullo had an arched doorway.
These two trulli had several others behind them.
From an overlook, we saw a whole bunch of trulli.
And finally, there was a church behind some trulli.
To the uninformed, the name Alberobello appears to mean "beautiful tree", but it does not. While albero is Italian for "tree", bello in this case does not mean "beautiful", but is instead derived from the Latin word bellum, meaning "war". The name thus means "tree of war" or maybe "forest of war". For more on Alberobello and its trulli, go here.