  We calculate the entanglement entropy in spaces with horizons, such as
Rindler or de Sitter space, using holography. We employ appropriate
parametrizations of AdS space in order to obtain a Rindler or static de Sitter
boundary metric. The holographic entanglement entropy for the regions enclosed
by the horizons can be identified with the standard thermal entropy of these
spaces. For this to hold, we define the effective Newton's constant
appropriately and account for the way the AdS space is covered by the
parametrizations.
