You can descend to the valley, where the Harmankaya Waterfalls (Harmankaya Şelaleleri) in the city centre of Zonguldak are located, through a narrow path in the forest. In most parts of the valley, there are paths that are 10 meters wide. After an average of 1,100 meters of hiking in the valley, you can see the first waterfall. After an uphill climb just past the first waterfall, proceed 20 meters on the path between the bushes and descend to the valley, at the top of the first waterfall flow. Another 250 meters from this spot is the second waterfall. Here, after a 30-meter climb in the forest next to the waterfall, you will walk down a 20-meter path and see the second waterfall. After walking a little further in the valley, you will come to the third waterfall. Lush green flora surrounds visitors along this trail. In the forest area within the valley, you may come across plants and trees such as chestnut, oak, hornbeam, linden, buxus, cranberry, alder, poplar, plane, blackberry, arbutus, wild apple, wild cherry, wild hazelnuts, bay, medlar, wild grapes, rowanberry, wild pear, rhododendron, blackberry, and rosehip.

Located in Zonguldak Ereğli, this museum was opened in memory of the Alemdar Ship, which played a significant role during the Turkish War of Independence. The ship contributed to the Turkish resistance by transporting weapons and ammunition across the Black Sea, and its crew demonstrated great bravery against the French occupation forces. The museum displays a full-scale replica of the ship and showcases maritime heroics from that era. The Gazi Alemdar Ship, a symbol of Turkish maritime heritage and the struggle for independence, is an important destination for history and maritime enthusiasts.

The museum is in a historical building, the former Halil Paşa Mansion. The Halil Pasha Mansion was built in the late 19th century during the rule of Sultan Abdulhamit II. Erected on the foundation of an old church, the mansion is decorated with ancient spolia collected from Roman-era structures. In addition to archaeological remains found in Black Sea Ereğli and its environs, the museum exhibits ethnographic artifacts unique to the region.

The Cehennemağzı Caves (Cehennemağzı Mağaraları) are located in the city center of the Ereğli district. A total of three caves were utilised during the Roman periods. Currently, the caves are designated as a historical site. They were referred to as Akheron (Acheron) Caves in archaeological sources and Cehennem Ağzı Caves (the Caves of Hell Mouth) among the locals. CaveChurch - Kilise Cave is a natural rock-cut cave. It was used as a Christian shrine during the Eastern Roman periods; in the early days of Christianity, the religion was not officially accepted by the Roman Empire, thus the early Christians worshiped in this cave secretly. Heracles Cave According to legend, Hercules/ Heracles (Herkül), who came here during the legendary Argonaut Campaign in 1200 BCE, completed in this cave the most difficult of the 12 tasks ordered by King Eurystheus. Hercules entered the cave and descended to the underground realm of the god Hades (the god of the underworld). From there, Hercules brought back Cerberus, the three-headed dog guarding the entrance of the underworld, to the world. The city was named Heracleia Pontica (Black Sea Ereğli) after Hercules, as he completed his twelfth mission in the cave, thereby saving the Mariandiyns, the inhabitants of Ereğli at that time, from tyrant rulers. Ayazma Cave Ayazma / Holy Spring Cave has a wide entrance and two halls. In one of the halls is a lake once considered sacred. The lake was also used as a cistern, providing the region’s water needs. In the area on the left side of the entrance, classical music performances are organized.

Experience the breathtaking allure of Türkiye's unique natural treasure, the Ancient Yew Tree, approximately 4,150 years old, and Gümeli Natural Monument in Zonguldak. Step into the mystic with a place that brings to life a timeless trove of natural wonders. Marvel at the same yew tree that has stood strong for nearly 4,150 years, carrying the wisdom of ages in its majestic branches. As you wander the lush, green trails of Gümeli, surrender to the serenity of this magnificent piece of natural preserve. Trek through paths dotted with patterns of wildflowers, breathe in the crisp mountain air, and let the whispers of the ancient yew tree and its verdant surroundings transport you to a realm far removed from the hustle and bustle of modern life. Nestled in the enchanting province of Zonguldak, the Ancient Yew Tree and Gümeli Natural Monument truly are a remarkable testament to Türkiye's commitment to conserving biodiversity. This area is not just a testament to the yew tree's resilient spirit but also a haven for myriad species and a source of great pride for locals. Encounter a corner of Türkiye where time appears to stand still—where each leaf tells a story and every rock narrates the riveting saga of life preserved over millennia. Come, explore the Ancient Yew Tree and Gümeli Natural Monument—a quintessential shutterbug's delight and an adventure-seeker's dreamland. Let your spirit take flight in the heart of Türkiye's unique heritage and inspiring biodiversity, etched into the very soul and earth of Zonguldak.