The Andaman and Nicobar Islands are a beautiful and remote archipelago in the Bay of Bengal, known for their stunning natural beauty and biodiversity. Here are some of the best places to visit in Andaman and Nicobar:

• Port Blair: The capital of the Andaman and Nicobar Islands, Port Blair is the gateway to the archipelago. You can visit the Cellular Jail, which is a historic site associated with India's struggle for independence. The Samudrika Marine Museum and the Anthropological Museum are also worth exploring.
  Best Time To Visit: Dry season (October to May) and the wet season (June to September)
  Peak Season (December- March).
  Delhi To Port Blair: Flight Time 3.5 – 4 Hours

Activities to Do: Parasailing, jet skis, banana boat rides, snorkelling etc

• Havelock Island: Known for its pristine beaches and crystal-clear waters, Havelock is a popular destination for water sports and relaxation. Radhanagar Beach is often considered one of the best beaches in Asia.
  Best Time To Visit: Monsoon Season (June – September) Peak Season (December – March)
  How to Reach: Private and government ferries from Port Blair and Neil Island.
  Activities to Do: Scuba Diving, Game Fishing, Kayaking, Candlelight Dinner.
  
  

• Neil Island: This smaller island is known for its tranquil and unspoiled beaches, including the famous Laxmanpur Beach and Bharatpur Beach. It's an ideal place for snorkeling and exploring coral reefs.
  Location: 37 km south of Port Blair.
  How to Reach: Port Blair (1.5 hours), Havelock (45 minutes) by Ferries
  What to Do: Bharatpur Beach, Sitapur Beach, and Laxmanpur Beach, Trekking, Glass Bottom Boat Ride.
  
  

• Ross Island: Located near Port Blair, Ross Island was the administrative headquarters of the British during their rule. Now in ruins, it offers a glimpse into the past. You can take a short boat ride to reach the island.

How to Reach: It’s one of Port Blair city’s closest Island. You can visit by taking a Taxi/Auto-Rickshaw or you can take a 15 Minutes boat ride from Aberdeen Jetty (inside the water sports complex).
Attractions: The Ruins, Museum, Japanese Bunkers, Wildlife Sanctuary, Light and Sound Show.
Timing: Ticket from Port Blair 9:00AM to 3:00PM. The light and sound show begins at 5.30 PM. Tickets need to be bought three days in advance.

• Baratang Island: This island is famous for its limestone caves and mud volcanoes. The journey to the caves takes you through dense forests and offers a unique experience of the islands' natural beauty.
  Location: Approximately 100 km from Port Blair.
  How to Reach: By Private/Government Bus or by hiring a private vehicle.
  Where to Visit: Limestone Caves, Mud Volcano, Parrot Island, Baludera Beach.
   

• North Bay Island: Known for its vibrant coral reefs, North Bay Island is a popular spot for snorkeling and scuba diving. The underwater marine life is spectacular, and you can explore it through glass-bottom boat rides as well.
  Location: About 4kms via sea from Port Blair.
  How to Reach: North Bay is a short (45 minute) boat ride from Aberdeen jetty.
  What to Do: Sea Walking, Scuba Diving, Parasailing, Glass Bottom Boat Ride.
  
  
• Little Andaman: Less frequented by tourists, this island offers a more off-the-beaten-path experience. You can visit the Butler Bay Beach, waterfall, and enjoy activities like surfing and trekking.

• Long Island: Another serene and less-visited destination, Long Island is known for its lush greenery, sandy beaches, and opportunities for nature walks and bird-watching.
  Location: Long Island is located about 35 km from Port Blair.
  How to Reach: Only by government ferry. It will almost take an entire day to reach the Island.
  What to Do: Blue Planet, Lalaji Bay, Maerk Bay, Bird Watching, Snorkel.

• Mount Harriet: This is the highest point in the Andaman Islands and offers panoramic views of the surrounding landscapes. It's a great spot for trekking and nature enthusiasts.
  How To Reach: 55 Kms by road/ 15 Kms by ferry and trek from Port Blair.
  What To Do: 2.5 Km amazing deep forest trek.

• Cinque Island: This remote island is perfect for scuba diving and snorkeling. The crystal-clear waters and diverse marine life make it a haven for underwater enthusiasts.
  Location: It is 26 km by sea from port blair.
  How to Reach: Hire a private boat.
  
  
• Mahatma Gandhi Marine National Park: Located near Wandoor, this park is known for its rich marine biodiversity. Glass-bottom boat rides are a popular way to explore the coral reefs and marine life.

• Chidiya Tapu: Known as the "Bird Island," Chidiya Tapu is a birdwatcher's paradise. It's a great place to watch the sunset and spot various species of birds.
  Location: Chidiyatapu is a beach situated 25 km from Port Blair.
  What to Do: Mundapahad Beach, Biological Garden, Do not miss the Sunset.

Please note that the accessibility of some of these islands and attractions may vary, and it's advisable to check the latest travel information and permits required before planning your trip to the Andaman and Nicobar Islands. Additionally, these islands are ecologically sensitive, so it's essential to be a responsible traveler and follow conservation guidelines.