Itinerary for 4 day trip to Bangkok

Here's an ideal itinerary for 4 days in Bangkok that meets your constraints:

Day 1: Arrival and Relaxation

Arrive at and check into your hotel in Sukhumvit.
Take some time to relax and unwind after your flight. You can enjoy the hotel amenities or take a stroll around the neighborhood to get a feel of the area.
In the evening, head to Terminal 21, a shopping mall with a unique concept of different floors representing different cities around the world. You can explore the shops, grab a bite to eat, and enjoy the lively atmosphere.

Start your day with a delicious breakfast at one of the many street food stalls in Sukhumvit. Try some local favorites like khao tom (rice soup) or khao neow moo ping (grilled pork with sticky rice).
Visit the and , two of Bangkok's most iconic landmarks. Marvel at the intricate architecture and learn about the history and culture of Thailand.
For lunch, head to Thip Samai Pad Thai, a famous restaurant known for its delicious pad thai. Be prepared to wait in line, but it's definitely worth it!
In the afternoon, visit , a beautiful green space in the heart of Bangkok. Take a leisurely walk, rent a paddleboat, or simply relax and people-watch.
End your day with dinner at Gaggan, a Michelin-starred restaurant that serves innovative Indian cuisine. Make sure to book in advance as it's a popular spot!

Start your day with a visit to , a serene oasis in the middle of the city. Take a jog or bike ride around the lake, or simply enjoy the peaceful surroundings.
For lunch, head to Eathai at Central Embassy, a food court that offers a wide variety of Thai dishes. Try some som tam (papaya salad) or tom yum goong (spicy shrimp soup).
Spend the afternoon shopping at EmQuartier, a luxurious mall with high-end brands and trendy restaurants. Don't miss the Helix Quartier, an outdoor spiral walkway with stunning views of the city.
In the evening, head to Asiatique The Riverfront, a night market with a lively atmosphere and plenty of food options. You can also catch a show at the Calypso Cabaret, a popular transgender cabaret show.

Start your day with a relaxing massage at one of the many spas in Sukhumvit. Try a traditional Thai massage or opt for a more luxurious spa treatment.
For lunch, head to Krua Apsorn, a restaurant that serves authentic Thai cuisine. Try their famous crab omelette or stir-fried morning glory.
Spend the rest of the day at your leisure, perhaps doing some last-minute shopping or simply enjoying the hotel amenities.
In the evening, head to the airport for your departure flight.

I hope this itinerary helps you plan your trip to Bangkok! Let me know if you have any other questions or preferences.