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A picturesque temple outside of Daejeon in the adjacent city of Gongju, but linked in on the Daejeon bus routes. In addition to the temple, the valley contains restaurants, hotels and saunas (including a fair few of the funky "hobbit mushroom" styled ones) and a fairly dramatic waterfall, albeit dry much of the year. This all falls within Gyeryongsan National Park. A well stocked tourist information booth exists at the entrance and is an ideal starting point for a hiking trip over the region. Restaurants in the area tend to be well catered towards foreign (primarily Japanese) tourists with picture menus of the most popular items: a rarity in central South Korea. To get in, the 107 bus will take you from Daejeon Korail station direct, although it is much faster to take the subway to the National Cemetery station, and hop on the 107 there as it prepares to zip out of town. The bus stop is right next to the subway exit.
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국립대전현충원
National cemetery for Korea's war heroes and patriots. It's quite beautifully landscaped and surrounded by a ring walking trail. Dress standards apply.
대전하나시티즌
The city's K-league soccer team. Daejeon, being a co-host of the 2002 FIFA World Cup, has a soccer stadium in Yuseong-gu on the north side of town (월드컵경기장 World cup kyeonggijang), quite literally and unbelievably plonked in the middle of a farm and now rather rusty in appearance. It's serviced by a dedicated subway station (listen for the old Korean World Cup theme song announcing the stop), although you'd have to walk through the Nouen Wholesale Market and adjacent Wholesale Fish Market to get there.
A heated foot spa. The temperature is pretty high but varies along the length so it's appropriate even in winter, and you won't overheat in summer. Unlike most foot spas, the local populace demands pre-washing of feet at the wash-station at the end of the foot spa prior to entering (akin to the etiquette of a full body public bathhouse). Drop your stuff where you intend to sit, then walk down the end, wash up, and walk down the spa to get back to your seat. It can be an embarrassingly fulfilling sight seeing the elderly locals accosting Korean visitors from elsewhere in Korea unaware of this unstated rule. To get there, leave the subway station and head towards the main Yuseong junction to the north. Turn east and follow the wide grassy median strip about 500 m down the road.
유성온천지구
Wounded soldiers of the Baekje Dynasty are said to have been healed after taking a bath in these springs. Kings and presidents including the first King of the Josun Dynasty, have reposed here.
Hot Springs & Saunas
These hot springs are known to be effective in countering many kinds of maladies. Containing alkaline minerals such as calcium, and potassium, sulfur, carbonic acid, silicic acid and radium and are considered to be beneficial in treating neuralgia and geriatric diseases. Accommodation is available nearby.
Here you can observe the sun during the day or any number of celestial bodies at night. Located west of Expo Park, take the 604 bus to the observatory stop.