Koh Larn sits seven kilometers off Pattaya's eastern shore, a 4.65-square-kilometer platform of coral limestone that draws half a million visitors each year to its six named beaches. The island entered the national marine register in 1982, though settlement predates official conservation by a century — fishing families occupied the northern coves before Pattaya's first resort opened in 1961. By the late 1980s, tour operators had established the speedboat corridor that now shuttles passengers from Bali Hai Pier to Tawaen Beach in twelve minutes, a route that has become the standard access point for day-trippers seeking shallow reefs and white sand within sight of the mainland. Coral Island Tour Pattaya Package itineraries typically anchor at Tawaen or Samae Beach, where water depth holds at two to four meters and visibility reaches fifteen meters on calm mornings between November and February. The coral formations here are remnant structures — bleaching events in 1998 and 2010 reduced live coverage to scattered patches — but the reef substrate still hosts parrotfish, butterflyfish, and occasional blacktip reef sharks in the deeper channels south of Nual Beach. Multi-island routes extend the circuit to Sak Island, a smaller outcrop three kilometers southwest, or loop north to include temple stops at the Sanctuary of Truth, a 105-meter teak structure completed in phases since 1981. Catamaran packages favor the western route, calling at Kled Kaew, Koh Phai, and Koh Rin before returning via the southern coast, a seven-hour circuit that covers eighteen nautical miles. The island's infrastructure expanded sharply after 2015, when municipal funding paved the island's single cross-spine road and installed desalination units to support twelve hundred resident households. Daily ferry schedules now run hourly from 07:00, with returns until 18:00, a rhythm that dictates the shape of most Coral Island Tour Pattaya Package tours: depart Pattaya by 08:30, anchor by 09:00, rotate through two to three beaches by midday, then clear the moorings before the afternoon return surge. Operators bundle parasailing, banana boat rides, and snorkel sets into tiered packages, though the core offering remains unchanged — a morning crossing to clear water, a buffet lunch on the sand, and a late-afternoon speedboat back to Bali Hai as the Gulf of Thailand light turns amber.