Visit the Beitou Thermal Valley (Hell Valley) to see how it gets its name: from the hot and steamy lake floating on its volcanic terrain. Geothermal springs heat the water to produce an unearthly atmosphere reminiscent of the depths of the underworld. Stroll along the fenced pathway, as it winds its way through the vapor encircling the boiling lake.

Admire the remarkable blue-green hues of the lake, made slightly milky by the sulfur in the hot springs. The steam rising from the water creates a moody setting, engulfing the valley and the cobbled walkway in a sulfuric haze. The damp sensation is particularly fierce during hot and humid summer days.

Spot the various calcified rocks that contain the radioactive element of radium. These hokutolite rocks are extremely rare.

The water contains a cocktail of chemicals, many of which are corrosive. Because of inherent dangers, respect the posted barriers and keep a safe distance away from these very hot waters.

Learn how, before safety restrictions were put in place, locals would boil eggs with the water. Purchase the hot spring eggs from the vendors near the entrance to the park or try the delicacy at one of the restaurants in the area.

Visit the park for free. It opens Tuesday through Sunday from morning until late afternoon. A trip here is an unforgettable experience year round.

The Beitou Thermal Valley (Hell Valley) is in the northern part of the Beitou District. Travel on the Tamsui-Xinyi Line of the metro to Beitou Station and walk east through Beitou Park to get here. You can also drive north from the center of Taipei to arrive in about 10 minutes.

While in the area, make sure to see some of the other nearby landmarks, including Puji Temple, the Beitou Museum and Zhongyong Park.