İncekaya Aqueduct

Originally built in Byzantine times but restored in the 1790s by İzzet Mehmet Paşa, İncekaya ('thin rock') Aqueduct is just over 7km north of Safranbolu. You can't walk across it due to safety concerns, but just before the aqueduct an entrance leads down into the Tokatlı Canyon where there are excellent views looking back up to the arched stone structure from the wooden walkway.