A line drawn across a desert, a stone face rising from grass or a rock with a trail behind it can be wonderfully puzzling at first. The best part comes next: finding out what people have learned about the place.

These nine settings mix human creativity with natural processes. Some questions remain open, while others have clear explanations. Knowing the difference makes the world more interesting, not less.

A monkey-shaped geoglyph with a spiral tail on the Nazca desert plain
A monkey-shaped geoglyph with a spiral tail on the Nazca desert plain.

1. Nazca and Palpa, Peru

The geoglyphs include animals, other figures and extensive geometric lines. They belong to long-lived cultural traditions on Peru’s arid coastal plain, rather than a single unexplained event. The UNESCO description explains their archaeological context and the ground-marking technique. Respect the protected landscape; the lines are not paths for visitors to trace on foot.

2. Rapa Nui, Chile

The moai were made by the Rapa Nui people as part of their own cultural and ceremonial life. Calling the sculptures inexplicable erases the people whose work they are. Start with Rapa Nui National Park’s heritage account and approach unresolved research questions without turning them into claims that human skill cannot explain the monuments.

Moai at Rano Raraku on Rapa Nui
Moai at Rano Raraku on Rapa Nui. Original image credit: Benjamin Gs.

3. Fly Geyser, Nevada

The colourful formations developed where drilling allowed geothermal water to reach the surface and deposit minerals. It is a meeting of human intervention and ongoing natural processes. Fly Ranch provides the relevant project and access information; a striking image does not make the site an unrestricted roadside stop.

4. Aogashima, Japan

The island’s nested volcanic forms create an extraordinary aerial view. The landscape has a geological history, and the island is also somebody’s home. Our Aogashima guide explains the setting and why transport and weather deserve more attention than a dramatic comparison with a fictional island.

5. Stonehenge, England

Stonehenge developed through several stages, rather than appearing as one finished monument on a single date. English Heritage presents the evidence and continuing research. The open questions are more engaging when placed beside what archaeology has already established.

6. Mount Bromo, Indonesia

Bromo’s cone and surrounding terrain can look otherworldly, but this is an active volcanic landscape in East Java. Our Bromo film story distinguishes a specialist production from present visitor arrangements. Use current park guidance for an actual journey.

7. Racetrack Playa, California

The moving stones are not a mystery requiring enormous winds or supernatural forces. Research published in 2014 documented movement involving shallow water, thin ice panels and light winds. The tracks record rare combinations of conditions. Leave stones in place and avoid damaging the playa, particularly when it is wet.

8. Mexico’s cenotes

Cenotes are natural sinkholes associated with limestone landscapes, with important cultural histories in the Maya region. They vary in form, access and permitted activities. Our cenote guide helps compare them without assuming that every blue pool is an unrestricted swimming spot.

9. Las Pozas, Mexico

Edward James’s surreal garden at Xilitla is an authored work of imagination, with structures that can resemble unfinished or dreamlike architecture among vegetation. Its unusual appearance is part of the artistic idea, rather than evidence of a vanished unknown civilisation.

Choose a place that sparks a specific question, then follow the evidence. Curiosity becomes a much better travel companion when it gives credit to both natural processes and human imagination.