A megalithic monument put up in several phases between 3000 and 2000 BC
on Salisbury Plain, England. Its great outer circle had thirty upright
sandstone blocks linked by lintels; inside stand five enormous
trilithons in a horseshoe and several groups of bluestones brought from
Wales. What it was for is still debated: ceremonial ground, solar
observatory, burial site, or several of those at once.
