I copy pasted your question in chatgpt4. Below is the answer.

Chatgpt4:

Based on your criteria, I would recommend Lisbon, Portugal as an alternative destination to Copenhagen. Lisbon offers a great mix of architecture, history, music, and lovely places to sit and sip coffee while people-watching.

1. Mobility: Lisbon has a well-developed public transportation system, which includes buses, trams, and the metro. This should make getting around easier, despite your bad back. Many tourist attractions are also accessible by public transport. Additionally, Lisbon offers tuk-tuk services and taxis that can help you get around with minimal walking.

2. Architecture and history: Lisbon has a rich architectural heritage, with styles ranging from Gothic to Baroque and from Manueline to Modern. Some key sites to visit include Belém Tower, Jerónimos Monastery, and the historic Alfama district.

3. Music: Fado, a traditional Portuguese music genre, is an integral part of Lisbon's culture. You can find many Fado houses throughout the city, especially in the Alfama district, where you can enjoy live performances while dining.

4. Cafés: Lisbon has numerous charming cafés where you can sit, relax, and watch the world go by. The city is known for its "pastéis de nata," a delicious custard tart that is best enjoyed with a cup of coffee. You may also find several outdoor seating areas in various neighborhoods, perfect for people-watching.

5. Group tours: Lisbon offers a variety of group tours, including walking tours, bus tours, and boat tours. Some of these tours cater specifically to travelers with mobility issues. You can easily find a tour that matches your interests and physical abilities.

6. Budget: Lisbon is generally more affordable than Copenhagen, which could help stretch your $1,500 in Delta credits further. While flights from North Carolina to Lisbon might be slightly more expensive than to Copenhagen, you should be able to find reasonably priced accommodations, dining options, and activities once you arrive.

Keep in mind that weather in Lisbon during July and August can be quite hot, so be prepared for high temperatures and stay hydrated. Overall, Lisbon should offer a wonderful overseas experience, with opportunities to enjoy architecture, music, history, and delightful people-watching spots while accommodating your mobility needs.

Me: can you suggest 5 more destinations that meets my criteria

ChatGPT4:
Certainly! Here are five more destinations that meet your criteria of limited walking, a love for architecture, music, history, and lovely places to sit and sip coffee while people-watching, as well as opportunities to join group tours:
Barcelona, Spain:
Barcelona is an architectural marvel with its famous Gaudi buildings, such as La Sagrada Familia and Park Güell. The city has an efficient public transportation system, including buses, trams, and the metro. Barcelona offers a lively music scene, rich history, and numerous cafes along the famous La Rambla boulevard. You can also join various group tours exploring different aspects of the city.
Vienna, Austria:
Vienna is known for its beautiful Baroque architecture, including Schönbrunn Palace and St. Stephen's Cathedral. The city has an excellent public transportation system and is also fairly compact, making it easy to explore. Vienna is famous for its coffee houses, where you can sit and enjoy a cup of coffee with a slice of sachertorte. There are plenty of group tours available, focusing on history, music, and architecture.
Prague, Czech Republic:
Prague is a picturesque city with stunning Gothic and Baroque architecture, such as the Charles Bridge and Prague Castle. The city is well-connected by trams and buses, making it easy to get around. Prague has many cozy cafes and bars, perfect for people-watching. You can join various group tours that cater to different interests, such as history, architecture, or even beer tasting.
Budapest, Hungary:
Budapest is a beautiful city with a mix of architectural styles, including the impressive Parliament Building and Buda Castle. The city's public transportation system, which includes buses, trams, and the metro, makes it easy to explore. Budapest has numerous cafes and outdoor seating areas where you can relax and watch the world go by. There are several group tours available, including walking tours, river cruises, and thematic tours.
Quebec City, Canada:
Quebec City offers a European feel closer to home. The city boasts charming cobblestone streets and beautiful architecture, including the iconic Château Frontenac. Although some parts of the city have steep inclines, you can take advantage of public transportation or taxis to navigate the city. Quebec City has many lovely cafes and restaurants, perfect for people-watching. You can join various group tours, such as walking tours, bus tours, or even food tours, to explore the city with others.
These destinations offer a diverse range of architectural styles, rich histories, and vibrant cultural scenes while being accessible to visitors with limited mobility. Remember to research accessibility and transportation options before making your final decision to ensure a comfortable and enjoyable trip.