7 stunning places around the world travellers can't enter

Sometimes, travel is all about exploring the unusual, unexplored islands, magical landscapes, secret worlds and places which appear to be out of this world.

Not all places that have stunning views make it to one’s bucket list.

There are some places that are off-limits as they need protection either due to their unique ecosystem or historical importance, or some places are just too dangerous to visit.

The very idea that one cannot visit such places makes them all the more attractive.

Here are some of the world's most tempting destinations that travellers can admire from afar, but cannot truly experience.(Representative image)North Sentinel Island, nestled within the Andaman and Nicobar Islands, seems like an idyllic tropical island covered in rainforests and turquoise seas.

However, it is one of the least accessible places in the world.

The island is inhabited by the Sentinelese, who belong to one of the last uncontacted indigenous populations on earth.

The Indian government has restricted access to the island for the safety of the tribe's traditions and to shield them from any possible diseases from the outside world.(Representational image)Unlike most islands, Surtsey is younger than many people alive today.

The island arose from the ocean due to a volcano erupting from 1963 to 1967 along the southern coast of Iceland.

Surtsey is considered to be one of the most valuable natural laboratories in the world because scientists can study the development of flora, fauna, and ecosystems in the virgin land.

Human access is almost completely restricted to prevent contamination of this natural experiment.Found by chance in 1940, Lascaux Cave holds impressive prehistoric paintings that are estimated to be 17,000 years old.

The walls are covered with depictions of horses, deer, bulls and other animals created by early humans.

The cave itself has been closed for tourists since 1963 due to damage caused to the paintings by carbon dioxide, humidity, and microbes introduced by the tourists.

Today visitors can see carefully created replicas instead.(Representational image)The official name of the island is Ilha da Queimada Grande.

This tropical island located near Brazil’s coast seems like a perfect place for a vacation.

However, there is more to Snake Island than meets the eye.

This is one of the major habitats of the highly venomous and critically endangered golden lancehead pit vipers.

Public access is heavily restricted, and only researchers with permission are generally allowed on the island.The legend of Area 51 might be more popular than the actual military installation itself.

Situated in Nevada, the highly secret military base has become the center for decades of alien conspiracy theories and speculations.

Although there are designated locations for observation of the area, entering the highly restricted military zone may lead to severe legal actions.Not far from Venice there is Poveglia, an island with rather a grim reputation.

It was used as a quarantine for people suffering from various plagues and later as a psychiatric hospital.

Nowadays public entry is prohibited because many buildings are in extremely dangerous condition.

Due to its grim history, Poveglia became one of the most intriguing forbidden places of Europe.(Representational image)China’s first emperor's burial site is a great archaeological mystery.

Although it is possible to visit the nearby Terracotta Army, the actual burial site is still untouched by archaeologists.

Archaeologists believe current technology may not be advanced enough to excavate the site without damaging valuable artifacts and historical evidence hidden within.

Plus, extremely high content of mercury.