Las Vegas is a city that never sleeps, and there's always something to do. Here's an ideal itinerary for 3 days in Las Vegas:

Day 1:

• Morning: Start your day with a visit to the iconic Welcome to Fabulous Las Vegas sign. Take some photos and enjoy the view of the Strip.
• Afternoon: Head to the Bellagio Hotel and Casino to watch the famous fountain show. The fountains dance to music every 15 minutes from 3 pm to 8 pm, and every half-hour from 8 pm to midnight.
• Evening: Enjoy a delicious dinner at one of the many restaurants in the Bellagio, followed by a Cirque du Soleil show. "O" is a popular choice, but there are many other shows to choose from.

Day 2:

• Morning: Visit the Neon Museum, where you can see vintage neon signs from old casinos and businesses. It's a great place to learn about the history of Las Vegas.
• Afternoon: Take a stroll through the Fremont Street Experience, a pedestrian mall in downtown Las Vegas. You'll find street performers, live music, and plenty of souvenir shops.
• Evening: Head to the Stratosphere Tower for dinner and a breathtaking view of the city. If you're feeling adventurous, you can also try one of the thrill rides on top of the tower.

Day 3:

• Morning: Visit the Hoover Dam, located just outside of Las Vegas. Take a guided tour to learn about the history and engineering behind this impressive structure.
• Afternoon: Spend the afternoon shopping at the Forum Shops at Caesars Palace. This upscale mall features designer stores, restaurants, and even a replica of the Trevi Fountain.
• Evening: End your trip with a visit to the High Roller, the world's tallest observation wheel. Take a ride at sunset to see the city light up at night.

Of course, there are many other things to do in Las Vegas, so feel free to customize this itinerary to your liking. Have a great trip!