Ute tour guides have been sharing the ancient dwellings and rock art inside this large park with visitors for more than 40 years.

A working cattle ranch with remarkably well-preserved prehistoric petroglyphs and ancient ruins.

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

A slab of sandstone covered with mysterious 1,000-year-old rock carvings from a vanished North American culture.

An outcropping plays host to the largest collection of pre-contact petroglyphs in Saskatchewan.

These petroglyphs created by ancient Arizonians have withstood centuries of exposure to the elements.

This set of mysterious petroglyphs in the Peruvian jungle could shed light on centuries-old activities in the region.

One of the few remaining indigenous petroglyph sites in Nevada.

A preserve with 75,000 ancient drawings remains the realm of public – not just scientific – exploration.

One of the American Southwest's most extensive collections of Navajo rock art.

Across Ring Mountain is a vast collection of Native American petroglyphs unique to the region.

Hidden in the Chihuahuan Desert resides an amazing collection of petroglyphs.

These mysterious petroglyphs in Vermont reflect a troubled history in the treatment of Native American culture.

These 7,000-year-old cave paintings depict life in Neolithic Spain.

Mysterious and ancient carved standing stones.

A sacred collection of indigenous rock art.

This Native American petroglyph marks the location of an important, Creek trail.

Press 1 for knock-knock jokes.

An archway adorned with vulnerable flora and fauna.

A masterpiece of Rationalist architecture in the center of Madrid with lizards on it.

A residential service road transformed into a menagerie of larger-than-life paintings of iconic Arctic wildlife.

A 5,000-year-old city in Peru holds the remains of a stunning set of astronomically-aligned pyramids.

This site is home to ancient petroglyphs and pictographs dating back to 6,000 B.C.

Kakadu National Park is known for its stunning beauty and its rock art, which represents the longest historical records of any continuous civilization on Earth.