0 a person who enjoys spending time in towns and cities going into buildings and places that are hidden or no longer used, and that may not usually be open to the public or legal to visit:
He is a photographer with more than two decades of experience as an urban explorer.
They sneaked onto the property, clearing soggy branches out of the way, and climbing through a basement grate to get inside. They call themselves urban explorers.
Since parts of the hospital are still in use, urban explorers should be cautious when exploring the grounds, since there have been reports of high security.
