Here's a suggestive itinerary for a 7-night all-inclusive holiday in Cancun from the UK:

Day 1: Arrival in Cancun

• Fly from the UK to Cancun International Airport.
• Arrive in Cancun and transfer to your all-inclusive resort.
• Check-in and spend the rest of the day relaxing and enjoying the amenities of your resort.
• Take a walk along the beautiful sandy beaches and soak in the stunning Caribbean views.
• Enjoy dinner and evening entertainment at the resort.

Day 2: Beach and Water Activities

• Start your day with a refreshing swim in the turquoise waters of the Caribbean Sea.
• Relax on the beach and soak up the sun.
• Engage in various water activities such as snorkeling, paddleboarding, or kayaking.
• Explore the nearby coral reefs and vibrant marine life on a snorkeling tour.
• Enjoy the all-inclusive amenities at your resort, including pools, spas, and fitness centers.

Day 3: Excursion to Chichen Itza

• Take a day trip to Chichen Itza, one of the New Seven Wonders of the World.
• Explore the impressive Mayan ruins, including the iconic El Castillo pyramid.
• Learn about the ancient Mayan civilization and its architectural achievements.
• Visit other notable structures such as the Temple of the Warriors and the Ball Court.
• Enjoy a traditional Mexican lunch and immerse yourself in the rich history and culture of the region.

Day 4: Relaxation and Resort Activities

• Spend the day enjoying the facilities and activities provided by your all-inclusive resort.
• Lounge by the pool and indulge in poolside refreshments.
• Take part in resort activities such as beach volleyball, yoga classes, or cooking demonstrations.
• Pamper yourself with a spa treatment or massage.
• In the evening, savor a delicious dinner at one of the resort's restaurants and enjoy the entertainment options.

Day 5: Isla Mujeres Excursion

• Take a boat trip to Isla Mujeres, a beautiful island located a short distance from Cancun.
• Explore the island's pristine beaches, crystal-clear waters, and vibrant marine life.
• Snorkel or dive in the famous MUSA (Museo Subacuático de Arte) underwater museum.
• Visit the picturesque downtown area of Isla Mujeres and browse local shops and restaurants.
• Enjoy a seafood lunch with views of the Caribbean Sea.
• Return to Cancun in the late afternoon and relax at your resort.

Day 6: Tulum and Cenotes Tour

• Embark on a day trip to the ancient Mayan city of Tulum, located on the coast.
• Explore the well-preserved ruins and learn about the history and significance of Tulum.
• Enjoy panoramic views of the Caribbean Sea from the clifftop site.
• Afterward, visit cenotes, natural sinkholes filled with freshwater, for a refreshing swim in their clear waters.
• Enjoy a traditional Mexican lunch at a local restaurant.
• Return to your resort in the evening and unwind.

Day 7: Free Day and Shopping

• Use this day to relax, enjoy the resort's amenities, and take advantage of any optional activities or excursions offered by the resort.
• Spend time shopping in Cancun's vibrant markets or modern shopping centers.
• Purchase souvenirs, handicrafts, or traditional Mexican goods.
• In the evening, indulge in a farewell dinner at one of Cancun's renowned restaurants and savor the flavors of Mexican cuisine.

Day 8: Departure

• Enjoy your final breakfast at the resort.
• Check out and transfer to Cancun International Airport for your return flight to the UK.

Please note that this itinerary provides a general framework for your 7-night all-inclusive holiday in Cancun, and you can adjust it based on your preferences and the specific amenities and activities offered by your resort. Cancun offers a blend of relaxation, cultural exploration, and natural beauty, ensuring a memorable holiday experience.