For first-time visitors to Vietnam, here are the must-see places:

1. **Hanoi**: The vibrant capital features the Old Quarter, Hoan Kiem Lake, and the Ho Chi Minh Mausoleum. Don’t miss local dishes like pho and egg coffee[1][4].

2. **Ha Long Bay**: A UNESCO World Heritage Site known for its stunning limestone islands and emerald waters. Opt for an overnight cruise to fully appreciate its beauty[1][2][5].

3. **Ho Chi Minh City (Saigon)**: Vietnam’s largest city offers a mix of history and modernity, with attractions like the War Remnants Museum and Ben Thanh Market[1][3].

4. **Hoi An**: Famous for its well-preserved ancient town, lantern-lit streets, and tailor shops. It's a great place to experience local culture[4][6].

5. **Sapa**: Nestled in the northern highlands, Sapa is perfect for trekking and experiencing ethnic minority cultures amid stunning landscapes[3][4].

6. **Phong Nha-Ke Bang National Park**: Home to impressive caves, including Son Doong, the largest cave in the world. Ideal for adventure enthusiasts[1][5].

7. **The Mekong Delta**: Known as the "Rice Bowl of Vietnam," it features floating markets and lush landscapes, best explored by boat[1][3].

These destinations provide a diverse glimpse into Vietnam's rich culture and natural beauty!

Sources
[1] Top 10 Must-Visit Places in Vietnam for First-Time Travelers - Goseetour https://goseetours.vn/blogs/inbound-blogs/top-10-must-visit-places-in-vietnam-for-first-time-travelers
[2] 8 Must-Do's In Vietnam If You Are A First Time Visitor - Klook Travel Blog https://www.klook.com/en-PH/blog/must-dos-vietnam/
[3] Where to visit in Vietnam first time top spots to explore - Asia Tour Advisorwww.asiatouradvisor.com › ... › Vietnam https://www.asiatouradvisor.com/where-to-visit-in-vietnam-for-the-first-time/
[4] A first-time guide to Vietnam - Lonely Planet https://www.lonelyplanet.com/articles/vietnam-tips-a-first-timers-guide
[5] First timer's guide to Vietnam 2024 https://www.vietnam-visa.com/first-times-guide-to-vietnam/
[6] Where to go (& NOT go) in Vietnam - Travel Like Anna https://www.travellikeanna.com/where-to-go-in-vietnam/
[7] 8 Best Places to Visit in Vietnam for the First-Time - Odynovo Tours https://www.odynovotours.com/vietnam/best-places-to-visit.html