Gayle Bidwell, left, and Jack Spey spend time on Feb. 20. 2010, inside the Great Kiva at the Aztec Ruins National Monument.
Gayle Bidwell, left, and Jack Spey spend time on Feb. 20. 2010, inside the Great Kiva at the Aztec Ruins National Monument. (Daily Times file photo)

AZTEC — A nod to presidential history will offer visitors added incentive to explore the Great Kiva this weekend.

Starting today, the Aztec Ruins National Monument will offer free admission to all visitors through Monday.

The free access to the Aztec's 900-year old ancestral Pueblo Great House is part of the U.S. National Park Service's celebration of the shared cultural history at 400 national parks throughout the country.

Visitors can explore the ancestral Pueblo cultural past along a self-guided trail walk and take advantage of videos and resources in the park's Earl Morris Visitor's Center.

Park rangers will offer interpretive talks and tours at scheduled times.

The centerpiece of the monument, a World Heritage site, is the Great Kiva, a semi-subterranean structure with a 40-foot diameter that was the social and religious center a millennium ago.

A list of American presidents and the national sites dedicated to them can be found online at www.nps.gov.

Park operating hours are 8 a.m. to 5 p.m.

For more information, call the Aztec Ruins National Monument at 505-334-6174.