Railay lies on the Phra Nang headland in Krabi’s Ao Nang area, where high limestone ridges interrupt the road network and shape the shoreline. The Tourism Authority of Thailand describes it as a pair of beaches on the west and east sides of the headland. Visitors usually come by longtail boat from Ao Nang rather than by road. The short crossing is part of the arrival: the coast, cliffs and landing beach come into view together.
Railay is often spoken of as one beach, but the two sides feel different. Railay West has a broad sandy shore and is the better-known place to swim and watch the evening light. Railay East is bordered by mangroves and mudflats and is not considered suitable for swimming; boats, paths and local businesses make it useful as a landing and walking side. The distinction matters when choosing accommodation or planning where to spend time in the water.