Pirin National Park has some 70 glacial lakes within its boundaries, remnants of the planet's last ice age. In which country would you find this location?

1. Bulgaria
2. Albania
3. Ukraine
The largest barrier reef in the northern hemisphere. In which country would you find this location?

1. Cuba
2. Belize
3. Peru
Los Glaciares National Park is home to the 99-mile-long Lake Agentino. In which country would you find this location?

1. Argentina
2. Chile
3. New Zealand
The Colorado River has been slowly carving out the Grand Canyon for millions of years. In which country would you find this location?

1. Spain
2. The United States of America
3. Mexico
Durmitor National Park was formed by glacial activity. The park's Tara river canyon houses one of Europe's deepest gorges. In which country would you find this location?

1. Montenegro
2. Austria
3. France
When you visit the waterfall in Iguazu National Park - one of the world's largest - is sure to impress. In which country would you find this location?

1. Colombia
2. Brazil
3. Argentina
You can enter the Iguazu National Park on the Argentinian side or the Brazilian side, so both answers are correct.
Canaima National Park, is home to the world's tallest waterfall, Angel Falls. In which country would you find this location?

1. Bolivia
2. Argentina
3. Venezuela
Fraser Island is the world's largest sand island and home to half the world's freshwater dune lakes. In which country would you find this location?

1. Madagascar
2. Australia
3. Philippines
At the edge of the Antrim plateau, some 40,000 black basalt columns jut out of the sea in a surreal formation known as Giant's Causeway. In which country would you find this location?

1. Iceland
2. Scotland
3. Northern Ireland
The beehive-shaped cones and towers known as the Bungle Bungle Range sit within UNESCO-listed Purnululu National Park. In which country would you find this location?

1. Malaysia
2. Australia
3. Papua New Guinea
Tucked amid the snow-capped peaks sits Huanglong valley and its series of strangely beautiful travertine lakes and waterfalls. In which country would you find this location?

1. South Korea
2. China
3. Japan
Some of the flora and fauna in the Socotra Archipelago look straight out of a surrealist painting. In which country would you find this location?

1. South Africa
2. Nigeria
3. Yemen
The 19 islands that make up the Galápagos offer one of the best opportunities in the world for up-close wildlife viewing. In which country would you find this location?

1. Equador
2. Chile
3. Mexico
Students of geology or anyone with a fascination with volcanoes should add the Volcanoes of Kamchatka to their bucket list. In which country would you find this location?

1. Canada
2. Russia
3. Japan
Iconic Mount Etna smoulders, a constant reminder of nature's more destructive forces. In which country would you find this location?

1. Greece
2. Iceland
3. Italy
Mount Kilimanjaro, Africa's highest peak, towers 19,340 feet above the surrounding plains. In which country would you find this location?

1. South Africa
2. Tanzania
3. Zimbabwe
More than 1,600 karst islands and islets jut out of the waters of Halong Bay, creating a setting as mystical as it is breathtaking. In which country would you find this location?

1. Laos
2. Indonesia
3. Vietnam
The dramatic landscape dominated by some of the world's longest and deepest fjords are both a UNESCO World heritage site and a popular cruising region. In which country would you find this location?

1. Latvia
2. Norway
3. Italy
The cliffs and rock formations found along the Dorset coastline tell a story of the Earth's geological history. In which country would you find this location?

1. Germany
2. England
3. Belgium
The series of lakes, caves and waterfalls of Plitvice Lakes National Park are nothing short of majestic. In which country would you find this location?

1. Poland
2. Croatia
3. Romania