Vouliagmeni (Greek: Βουλιαγμένη, meaning "sunken") is a seaside town and former municipality 20 km south of Athens, Greece.
Vouliagmeni sits on the southwestern foot of the Hymettus mountain range. It is bisected by a palm tree lined boulevard, Athinas Avenue, which arrives from Athens as Vouliagmenis Avenue, then runs parallel to the seashore and continues southwards. The area east of the main road is the rocky slope of a foothill of Mount Hymettus, and the bulk of the town is built there, along with the local elementary school, post office, banks and town hall.
The western half, located between Athinas Avenue and the sea, is covered with pine trees and consists of two peninsulas, Megalo and Mikro Kavouri ("Big Crab" and "Little Crab") that feature sandy and pebble beaches in between rocky shores, luxury hotels (including the Astir Palace Hotel occupying most of Mikro Kavouri), the local high school, the picturesque chapel of "St. George of the crab", two marinas, an aquatic sports club (the "Nautical Club of Vouliagmeni", see below), a sports club (soccer, basketball, volleyball, tennis) and upscale restaurants, taverns and cafeterias on the waterfront.
The Mikro Kavouri is connected to the mainland with a narrow, sandy isthmus commonly referred to as "Laimos" (λαιμός, i.e. the "Neck"), flanked by one public beach on one side and Astir Palace beach on the other side. The Megalo Kavouri is land largely owned by the Church of Greece, which maintains an enclosed, protected pine forest and an orphanage. An air force camp is also located there. Dotted with lavish villas, the two Kavouri areas are among the most expensive pieces of housing real estate in Greece.
The Vouliagmeni beaches are consistently awarded the coveted EU blue flags for environmental excellence. The triathlon competition for the 2004 Summer Olympics took place in this area. The small, rocky islet of Fleves lies off shore.
In 1993 and again in 2009, it hosted the annual meeting of the Bilderberg Group.