In this day and age, we like to think that we can travel whenever and wherever we’d like. However, there are quite a few places in the world where that’s simply not possible. Some are closed to everybody and others open their doors to just a few. Here are some wonderful locations where visitors aren’t allowed.

HEART REEF, AUSTRALIA

Heart Reef has become one of Australia’s most famous places since it was first discovered by a pilot 47 years ago. As it’s a protected area, no one can come to this Australian tourist destination. Luckily, it’s allowed from above, so visitors can still take in this wonderful natural formation(形成物) by air.

LASCAUX CAVES, FRANCE

The Lascaux Caves are one of the great treasures of pre-historic art. Filled with cave art painted 17,000 years ago, the caves were discovered in 1940. They were open to the public, but not for a long time. For about 15 years thousands of visitors a day entered the caves to enjoy the Paleolithic paintings, but by 1963 that had come to an end. The caves were closed to the public because the carbon dioxide(二氧化碳) made by all the visitors caused green mold(霉菌) to cover the artwork. Since then, art historians have worked hard to restore that in the caves.

SURTSEY ISLAND, ICELAND

Surtsey Island has provided scientists with the chance to see how an ecosystem is born. The only people allowed on the island are a small number of researchers who monitor its plants and animals in order to better understand how biodiversity(生物多样性) develops when nature is untouched by humans.

1. When did the pilot find Heart Reef?

A    In 1965.

B    In 1975.

C    In 1985.

D    In 1995.

2. In which way can people enjoy the beauty of Heart Reef?

A    By boat.

B    By train.

C    By plane.

D    By car.

3. Why weren’t the Lascaux Caves allowed to visit?

A    Because green mold can’t be restored.

B    Because visitors are harmful to the artwork.

C    Because government fears someone may steal the artwork.

D    Because the artwork is harmful to humans.

4. __________ are allowed to stay on the Surtsey Island.

A    A few researchers

B    Animal lovers

C    Plant lovers

D    Pilots

5. Where is the passage probably taken from?

A    An instruction book.

B    A school report.

C    A storybook.

D    A geography magazine.