Railay Beach is a coastal peninsula in Krabi Province, southern Thailand, known for its limestone cliffs, sheltered bays, and beaches facing the Andaman Sea. Although connected to the mainland, the area is reached primarily by boat because steep limestone formations make direct road access impractical. Railay is generally divided into Railay West, Railay East, and the Phra Nang area, each with a different shoreline and landscape. Tall karst cliffs rise behind the beaches, while mangroves and rocky coastal areas surround parts of the peninsula. Its unusual geography is one of Railay's defining features.

The area is part of a wider coastal landscape shaped by fishing, maritime travel, and Buddhist traditions. Phra Nang Cave is associated with local beliefs surrounding a princess spirit, and offerings are traditionally placed inside the cave by people seeking protection or fertility. Nearby caves and cliffs also reflect the area's long relationship with the sea and limestone landscape. Railay does not have a large permanent urban center, and its identity is closely connected with the communities and mainland districts of Krabi. Longtail boats remain an important part of local transport, linking Railay with nearby coastal communities and islands.

Railay's limestone cliffs are particularly well known among rock climbers, with routes ranging from accessible climbs to technically demanding walls above the beaches and jungle. Phra Nang Beach has a broad sandy shoreline backed by cliffs and is adjacent to Phra Nang Cave. Railay West faces a wide bay and is suited to swimming when sea conditions allow, while Railay East has a mangrove-lined shore that is less suitable for swimming. A short trail leads to Railay Viewpoint, and paths continue toward the lagoon area beneath steep cliffs. Nearby islands and beaches can also be reached by boat.

Food in Railay reflects the wider cuisine of southern Thailand, with seafood, curries, rice dishes, noodles, spicy salads, and tropical fruit widely available. Fresh fish, prawns, squid, and crab feature prominently in restaurants because of the area's coastal location. Coconut milk, chili, turmeric, lemongrass, and seafood are common ingredients in southern Thai cooking. Longtail boats carrying passengers and supplies are a familiar sight along the shoreline, while the absence of conventional road access gives Railay a different rhythm from many mainland beach communities. Its limestone geology, cave traditions, and boat-based connections are central to the area's character.