"When in Rome, do as the Romans do," the proverb says. But what if you're only in the Italian capital for just one day and you're keen to fit in as much of its history and culture as possible? Sure, you could take a few hours out to plan your trip or you could try to book a tour guide to take you round "The Eternal City." But now there's a third option: Tourism apps, websites and chatbots that use artificial intelligence to tailor itineraries for the user based on their preferences and time. They're rapidly popping up, so NBC News decided to put three of them to the test.

A robot called Golfi is the first to be able to autonomously spot and travel to a golf ball anywhere on a green and sink a putt. Golf-playing robots have been developed before, but they have needed humans to set them up in front of a ball and program them to make the correct swing. The most famous is LDRIC, a robot that hit a lengthy hole-in-one at Arizona's TPC Scottsdale golf course in 2016. In contrast, Golfi, engineered by Annika Junker at Paderborn University in Germany and her colleagues, can find golf balls and wheel itself into place thanks to input from a 3D camera that looks down on a green from above. The camera scans the green and an algorithm then approximates the surface before simulating 3000 golf swings towards the hole from random points, taking into account factors such as the speed and weight of the ball and the friction of the green, which are described by physics-based equations.

In an article published in the journal Foods, researchers tested a CNN algorithm to assess its potential for olive classification for industrial purposes, specifically its potential integration and sorting performance evaluation. A staple of the Mediterranean diet is olive oil. Italy produces extra virgin olive oil (EVOO), which is well-known around the globe due to its high nutritional content. Therefore, it is critical to process the harvested olives and to take extra care during mechanical harvesting to prevent internal damage, which might impair the quality of the finished product, and to preserve the chemical and sensory quality criteria of EVOO. Optoelectronic equipment is often used to improve batch quality and the sorting and grading of items.