The Colorado National Monument Visitor Center Complex in Colorado National Monument

Colorado National Monument

- Trails :The Monument contains many hiking trails, with lengths and difficulties to suit all tastes. Summer storms can cause flash floods as well as dangerous trail conditions. Rattlesnakes are found on the Monument, and rough terrain exists everywhere, but most trails are well-maintained...

 is an example of the park services facilities designed and built as part of the Mission 66

Mission 66

Mission 66 was a US National Park Service ten-year program that was intended to dramatically expand Park Service visitor services by 1966, in time for the 50th anniversary of the establishment of the Park Service....

 program. The complex includes the visitor center, designed by National Park Service

National Park Service

The National Park Service is the U.S. federal agency that manages all national parks, many national monuments, and other conservation and historical properties with various title designations...

 architect Cecil Doty, the Bookcliff Shelter, designed by NPS architect Phil Romigh, and the Canyon Rim Trail, designed by NPS landscape architects Babbitt Hughes, and built between 1963 and 1965. The structures follow the precedent set by earlier park structures by using native sandstone

Sandstone

Sandstone is a sedimentary rock composed mainly of sand-sized minerals or rock grains.Most sandstone is composed of quartz and/or feldspar because these are the most common minerals in the Earth's crust. Like sand, sandstone may be any colour, but the most common colours are tan, brown, yellow,...

 laid in a random ashlar

Ashlar

Ashlar is prepared stone work of any type of stone. Masonry using such stones laid in parallel courses is known as ashlar masonry, whereas masonry using irregularly shaped stones is known as rubble masonry. Ashlar blocks are rectangular cuboid blocks that are masonry sculpted to have square edges...

pattern.