From buildings perched on the top of towering cliffs, to towns without a single road, to remote islands, the world is full of places that make you wonder how it is even possible to visit these places. Here, we take a look at some of these incredible, extreme places that have always been difficult to access, like South Georgia and the South Sandwich Islands.

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1. South Georgia and the South Sandwich Islands

Located in the southern Atlantic ocean, South Georgia and the South Sandwich Islands are British territories, home to a wide array of wildlife, including penguins, sea birds and seals. The islands are one of the most remote places in the world, only accessible by sea because there is no airstrip. The from the Falkland Islands, according to News.com.au, and the Southern Ocean is one of the roughest in the world. The islands were once settled by whalers, but have no local residents today, home only to a few research scientists and British government employees.

2. Saint-Michel D’Aiguilhe Chapel, France

Located in the french village of Le Puy-en-Velay, the is perched . The : before the chapel was built in the year 962, the site had been home to a prehistoric dolmen, as well as a Roman worshipping site for the god Mercury, reports Sacred-Destinations.com. The chapel later became a pilgrimage site in the Middle Ages. Today, visitors can reach the chapel via stairs that have been carved into the volcanic rock.

3. Jan Mayen, Norway

The Norwegian, volcanic island of and is one of the least populated places in the world. The island, officially a Nature reserve, and became part of Norway in the 1930s. Visitors need permission to go to the island, which is very difficult to get to. There is only one airstrip, which , according to News.com.au. Visitors can also visit the island by boat from Iceland or Norway, or by booking an Eco-expedition.

4. Taung Kalat, Myanmar

Perched 2,417 feet above sea level, Taung Kalat is a beautiful Buddhist monastery that is guarded by monkeys. According to legend, it is also inhabited by 37 long-suffering spirits, called nats. These that died in violent or painful circumstances, according to Slate. Today, the, reports the Daily Mail, visited by Burmese pilgrims that bring offerings to the Great Nats each year.

Travelers wanting to take in the fantastic views from the summit have to climb 777 steps, a journey that, according to Lonely Planet,. Along the way, the monkeys are known to try to from visitors making the hike.

5. Katski Pillar, Georgia

Located in western Georgia, the Katskhi pillar is a 131-foot-tall limestone monolith. , likely used for fertility rites, according to Atlas Obscura, but in the fourth century, and a small church was built at its summit between the 6th and 8th century. The church is believed to have been used to , who were early Christian ascetics.

The pillar remained until 1944 when it was climbed again. The , reports Amusing Planet, and the top of the rock is accessible via an iron ladder that takes about . A monk named Maxime Qavtaradze currently lives there, according to The Huffington Post, and food is delivered to him via a winch. Visitors are allowed, but .

6. Supai, Arizona, USA

The village of Supai is located within the Havasu Canyon, a southwestern branch of the Grand Canyon, and it is home to the Havasupai Tribe. The village is renowned for its beautiful waterfalls and camping sites.

Supai is , according to the National Park Service, so the only way to get there is either by foot, horseback, or helicopter. The village is so remote that the - a journey that takes three-hours one-way, according to CBS News. The nearest town providing food, water and gas to hikers is .

7. The Meteora Monasteries, Greece

Situated at the top of 1000-feet-tall sandstone peaks, were built in the 11th century by monks in Thessaly (Central Greece). Twenty-four monasteries were built overlooking the surrounding valley, but today, . According to UNESCO, monks and pilgrims were hoisted up the side of the cliff in baskets since there are no roads or stairs to reach these rocky peaks. Luckily for visitors today though, into the rocks to allow for easier access, reports Lonely Planet.

8. Iquitos, Peru

Iquitos is Peru’s largest jungle town and an important port city of the Amazon, located at the confluence of the Nanay and Itaya rivers. With a population of around 422,0000, it is also the world’s largest city that cannot be reached by road because it on all sides, reports Amusing Planet.The only way to travel to Iquitos is to fly or take a boat (and the boat journey ).

The city is known for its mélange of mud huts and tiled mansions, tiny dugout canoes and floating Belen shantytown markets. Visitors to this city should know that costs are higher in Iquitos than other cities, according to Lonely Planet, because .’

9. Aogashima Island, Japan

Situated in the Philippine Sea, Aogashima is a giant volcanic crater island in the Izu Archipelago that is inhabited by approximately 200 people. Inside the giant volcanic crater island, there is another smaller volcano, which , reports Amusing Planet. The last eruption was in the 1780s.

Today, the island attracts visitors because of its volcanic hot springs, scuba diving and hiking. Getting there, though, can be difficult, because it is located in a region of open seas , according to Amusing Planet, so the journey must be made by ferry or helicopter. Once on the island, there is a before traveling, reports Oddity Central.

10. Ittoqquortoormiit, Greenland

is Greenland’s most remote village, home to less than 500 people. This small fishing and hunting village is located in the eastern part of the country, next to the world's largest fjord, Scoresby Sund. also live in the region, says Air Greenland. It can be difficult to get to Ittoqqortoormiit because there are generally from Reykjavik Iceland in the summer, and only one in the winter.

11. Elliðaey, Iceland

Off the south coast of Iceland, there is a mysterious little island called Elliðaey that has only one house on it. Visitors have to sail to the island by boat, according to Amusing Planet, then on its lower east side to reach the house. Very little is known about the history of the island, although according to the website, it is believed to have about 5000 years ago. No one lives on the island, but a few cattle and thousands of sea birds.

12. Hermitage of San Colombano, Italy

The hermitage of San Colombano is carved into a rock ledge about 390 feet high. The natural caves around it appear to have been inhabited since 753, and the , according to the Rovereto and Vallagarina Tourist Board. The church was named after a knight who, that had been terrorizing the area, says Visit Trentino. Tourists can access the hermitage via a 102-step stairway carved into the rock cliff.

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