Mt.Aso's  caldera is one of the world's largest calderas, which stretches 18km east-west, 25km north-south. There are five mountains, Mt.Nekodake, Mt.Takadake, Mt.Nakadake, Mt.Eboshidake, Mt.Kishimadake  called "Aso Gogaku" at the center of the caldera. Mt.Nakadake is still active and its crater is 600m in diameter, 130m in depth and 4km in circumference. You can see the huge crater emitting white smoke and the magnificent scenery up close. When the level of volcanic activity is high, you may not be able to approach the crater.
※Access to the crater can be restricted due to the weather conditions, please check the following website in advance for details.

Information on restrictions for the Aso Volcano Crater (The Aso Volcano Disaster Prevention Council)

Kusasenri is a vast grassy plain which offers great views of the volcanically active Nakadake Peak. Kusasenri also features a large pond and horses can be seen grazing on the land. This scenic location has become a popular feature of the Aso Geopark.

Kusasenri offers a different landscape depending on the season. In summer the grasses are vibrant and green, while in winter everything becomes silver. This changing scenery makes Kusasenri a place that is worth visiting many times throughout the year.

If you are looking for more excitement than just enjoying the scenery, there are also a number of activities which can be undertaken at Kusasenri such as horse riding and hiking.

Many poets have written songs about Kusasenri's beauty over the years.

Mizuki means a fountain, and there are springs called Mizuki on Ichinomiya Monzen Shopping Street. The water is prized as delicious, mellow consecrated spring water and worshiped as water which gives perpetual youth and longevity. Inhabitants in Ichinomiya have appreciated the consecrated water daily and lived with it. Because they thought more people should drink the beautiful water, they have built 14 wooden or stone fountains since around 10 years ago and let people who pass by drink the water.

Besides, because most of the fountains are located along Nakamachi Street near the approach of Aso Shrine, a stroll can be also enjoyed. During the tour of fountains, tourists can take a break at a traditional store or a coffee shop as well.

Daikanbo is in the northeast of the Uchinomaki Onsen area and is on the edge of the outer rim of the Aso caldera.

Daikanbo offers the best 360-degree panoramic view in Aso. Here, you can see the Five Peaks of Aso, as well as the Kuju Mountain Range.
The Five Peaks of Aso, as seen from Daikanbo, are said to resemble a Buddha lying down. During the fall and winter months it may be possible to see a phenomenon known as "Unkai" in Japanese, where the clouds are low and the peaks appear to rise from a sea of clouds. 

Daikanbo viewing point also has a souvenir shop and restaurant, and is also popular for stargazing at night.
 

This plateau of wide, green pasture extends over Minamifumoto in the Kuju mountain range from Oita. As far as you can see, there is nothing but a green pasture here.

Kurokawa Onsen, at an elevation of 700meters, is renowned as one of the most popular hot spring spots in Japan. Each Onsen Ryokan(inns) has different attractive open-air bath, Rotenburo.
You can purchase “Tegata”, a wooden pass, as bath charges for 3 different open-air baths you chose.
When strolling around, “Yurutto coupon” is recommended. It is 500 yen, a book of 6 coupons, and it is available at shops which sell sweets and croquettes. The coupon and “Tegata” can be purchased at Kazenoya, a Tourism Center.