Certainly! Visiting Kecskemét, Szeged, and Debrecen in Hungary will introduce you to stunning architecture, rich history, and vibrant cultural scenes. Here are some travel tips:

Best Time to Visit:
The best time to visit these cities is between late spring (May) and early autumn (September) when the weather is mostly warm and sunny. July and August can be particularly hot and crowded.

Route and Accessibility:
Public transport such as trains and buses are reliable and can be used to move between the cities conveniently. You might also consider hiring a car if you prefer more flexibility.

Altitude and Acclimatization:
These cities are on relatively flat terrain, so altitude sickness won't be an issue.

Accommodation and Booking:
You can find a range of accommodations that suit different budgets in these cities, from hostels to luxury hotels. It's recommended to book in advance, especially during the summer months.

Clothing and Essentials:
Pack both light and warm clothing as the temperature may vary. A good pair of walking shoes is essential, given the amount of sightseeing you might do. Also, don't forget a good sunscreen and a hat to protect against the sun.

Health and Safety:
European Health Insurance Card (EHIC) holders are entitled to access the necessary state-provided healthcare in Hungary. Make sure to follow any health advisories or alerts issued. It's also advisable to have travel insurance to cover any unexpected events.

Local Etiquette and Respect:
Hungarians appreciate politeness. Greet people with a handshake. When visiting churches or other religious sites, modest dress is required; shoulders and knees should be covered. Also, remember to tip about 10% in restaurants, taxis, and hairdressers.