Hardened lava sediments from the 1986 eruption can be seen along the gentle hiking trails leading up the northern slopes of Mount Mihara. It takes 45 minutes on the northwestern trail or 60 minutes from Miharayama Onsen to hike to the top of the mountain. At the summit, the trail circles the caldera which measures 300 meters in diameter and 200 meters in depth, providing breathtaking scenery.

The informational museum covers topics such as volcano structures, formation, geography and explosion patterns. It shows vivid footage of various volcanic eruptions, including that of the 1986 Mount Mihara eruption. In one of the exhibition rooms, a collection of photographs of volcanoes around the world is displayed, along with volcanic rock and lava specimen samples. Limited English information presents a shortcoming to the otherwise interesting museum.

Along the main road at the southwestern side of the island is a stretch of about 700 meters of cliffs that are the cross section of a volcanic stratum. Layers of volcanic sediment are clearly visible in the cliffs, making them a curious yet beautiful sight.

At the southeastern coast about ten minutes by car from Habu Port is an observation point where nice coastal views and a small island named Fudeshima can be seen. The island was formed by hardened volcanic rock and is thus named because it is shaped like a brush.

This hot spring bath belongs to the Oshima Onsen Hotel, and is open to day visits. There is one indoor and one outdoor bath for each gender. On clear days, beautiful views of Mount Mihara can be enjoyed while taking a dip in the outdoor baths.

Hama no Yu is a relaxing open-air bath situated just by the sea. Swimsuits are required at this mixed-gender bath.

Perhaps nowhere else in Japan can so many Camellia (Tsubaki) plants of different varieties be found at a single location than on Oshima. The plants' flowering periods differ by variety, but many are in bloom from January through March across the island, especially in February. A festival is held from around late January to late March. The best place to view camellia is Oshima Park which showcases thousands of camellia plants of around 450 varieties. Oil extracts from tsubaki seeds are used in popular hair and skin products that have become famous nationwide under the Oshima Tsubaki brand.

The small fishing town at the port provides nice photographing opportunities, including a nostalgic alley with old-fashioned looking houses behind the docking area.

Odoriko are "dancing girls", a profession popularly depicted in a novel by the late Kawabata Yasunari, who won the Nobel Prize for Literature. The ryokan-turned museum commemorates the odoriko who were active in the Izu Region in the 1900s. Displays of life-sized odoriko models can be seen in wide tatami floored rooms which provide a glimpse of the interior decor of the former ryokan.

This house stands above a steep slope east of the port and used to be the estate of the head of the fishermen's union during the Meiji Period. Visitors can walk in the residence's garden, enter the building and view its wide tatami floored rooms and function spaces. It is connected with the port below via a long flight of stone steps.

The observation deck, located along the main road on higher grounds north of the port, provides nice views over the port town.