The ancient Great Wall of China at Mutianyu, north of Beijing (formerly Peking)

Tourists walk the ancient Great Wall of China at Mutianyu, north of Beijing (formerly Peking), China

Watchtower arch of the Great Wall of China at Mutianyu, north of Beijing (formerly Peking), China

Chinese boy walking up steps of the Great Wall of China at Mutianyu, north of Beijing, China

The ancient Great Wall at Mutianyu, north of Beijing (formerly Peking)

Tourist couple walk the ancient Great Wall of China at Mutianyu, north of Beijing, China

Father with his daughter on the Great Wall of China at Mutianyu, north of Beijing (formerly Peking), China

Chinese boy walking the Great Wall of China at Mutianyu, north of Beijing (formerly Peking)

American Chinese family walk the ancient Great Wall of China at Mutianyu, north of Beijing, China

The ancient Great Wall of China snaking through mountains at Mutianyu, north of Beijing (formerly Peking)

The ancient Great Wall of China snaking through mountains at Mutianyu, north of Beijing (formerly Peking)

Father with his daughter on the Great Wall of China at Mutianyu, north of Beijing (formerly Peking), China

The ancient Great Wall of China at Mutianyu, north of Beijing (formerly Peking)

The ancient Great Wall of China snaking through mountains at Mutianyu, north of Beijing (formerly Peking)

Tourists walk the ancient Great Wall of China at Mutianyu, north of Beijing, China

The ancient Great Wall of China at Mutianyu, north of Beijing (formerly Peking)

Terracotta army warriors at tomb of Emperor Qin Shi Huangdi at Lingtong in Xian, China

Stone walls of Sacsayhuaman above Cusco in Peru, South America

Two men walk along the side of the Great Wall of China at Mutianyu, north of Beijing (formerly Peking), China

Tourist takes a photograph on the ancient Great Wall of China at Mutianyu, north of Beijing (formerly Peking), China

Detail of the ancient Great Wall of China at Mutianyu, north of Beijing (formerly Peking) , China

Tourists walk the ancient Great Wall of China at Mutianyu, north of Beijing (formerly Peking), China

The ancient Great Wall of China at Mutianyu, north of Beijing (formerly Peking)

The ancient Great Wall of China snaking through mountains at Mutianyu, north of Beijing (formerly Peking)

Western tourists walk the ancient Great Wall of China at Mutianyu, north of Beijing, China

Terracotta Army warriors at the tomb of Emperor Qin Shi Huang at Lingtong in Xian, China

Statue of Christ the Redeemer, chosen one of the seven wonders of the modern world, Rio de Janeiro, Brazil, South America

Statue of Christ the Redeemer, chosen one of the seven wonders of the modern world, Rio de Janeiro, Brazil, South America

Statue of Christ the Redeemer, chosen one of the seven wonders of the modern world, Rio de Janeiro, Brazil, South America

Statue of Christ the Redeemer, chosen one of the seven wonders of the modern world, Rio de Janeiro, Brazil, South America

Great Pyramid of Giza (Pyramid of Khufu and Cheops), and Pyramid of Khafre (Pyramid of Chephren), Giza, Cairo, Egypt

Great Pyramid of Giza (Pyramid of Khufu and Cheops), and Pyramid of Khafre (Pyramid of Chephren), Giza, Cairo, Egypt

The Great Sphinx and Pyramid of Khafre, also known as Pyramid of Chephren, Giza, Cairo, Egypt

Great Sphinx and Great Pyramid of Giza, also known as Pyramid of Khufu and Pyramid of Cheops, Giza, Cairo, Egypt

Temple of Artemis, antique city of Ephesus, Efes, Turkey, Western Asia

Three-dimensional representation of the Sun and her planets, Out of this World ? Wonders of the Solar System, exhibition in the Gasometer, a former gas tank, Oberhausen, Ruhr Area, North Rhine-Westphalia, Germany, Europe

Three-dimensional representation of the Sun and her planets, Out of this World ? Wonders of the Solar System, exhibition in the Gasometer, a former gas tank, Oberhausen, Ruhr Area, North Rhine-Westphalia, Germany, Europe

Planets and Globe, Solar system model, Out of this World ? Wonders of the Solar System, exhibition in the Gasometer, a former gas tank, Oberhausen, Ruhr Area, North Rhine-Westphalia, Germany, Europe

Three-dimensional representation of the Sun and her planets, Out of this World ? Wonders of the Solar System, exhibition in the Gasometer, a former gas tank, Oberhausen, Ruhr Area, North Rhine-Westphalia, Germany, Europe

Lunar globe on a horse-drawn carriage, Out of this World ? Wonders of the Solar System, exhibition in the Gasometer, a former gas tank, Oberhausen, Ruhr Area, North Rhine-Westphalia, Germany, Europe

Three-dimensional representation of the Sun, Out of this World ? Wonders of the Solar System, exhibition in the Gasometer, a former gas tank, Oberhausen, Ruhr Area, North Rhine-Westphalia, Germany, Europe

Model of the Iss, International Space Station, and the Moon, Out of this World ? Wonders of the Solar System, exhibition in the Gasometer, a former gas tank, Oberhausen, Ruhr Area, North Rhine-Westphalia, Germany, Europe

Three-dimensional representation of the Sun and her planets, Out of this World ? Wonders of the Solar System, exhibition in the Gasometer, a former gas tank, Oberhausen, North Rhine-Westphalia, Germany, Europe

Three-dimensional representation of the Sun and her planets, Out of this World ? Wonders of the Solar System, exhibition in the Gasometer, a former gas tank, Oberhausen, Ruhr Area, North Rhine-Westphalia, Germany, Europe

The Sphinx and Pyramid, Cairo, Egypt, Africa

Leaning tower of Pisa, Tuscany, Italy

Leaning tower of Pisa, Tuscany, Italy

25 meter diameter model of the Moon, Out of this World ? Wonders of the Solar System, exhibition in the Gasometer, a former gas tank, Oberhausen, Ruhr Area, North Rhine-Westphalia, Germany, Europe

Baptistery St. John, Pisa, Tuscany, Italy

Cathedral Santa Maria Assunta and Leaning tower, Pisa, Tuscany, Italien

Leaning tower, Pisa, Tuscany, Italy

Gullfoss waterfall, Golden Circle, Iceland, Europe

Gullfoss waterfall, Golden Circle, Iceland, Europe

The Golden Gate Bridge is a suspension bridge spanning the Golden Gate, the one-mile-wide (1.6 km) strait connecting San Francisco Bay and the Pacific Ocean. The structure links the American city of San Francisco, California the northern tip of the San Francisco Peninsula to Marin County, carrying both U.S. Route 101 and California State Route 1 across the strait. The bridge is one of the most internationally recognized symbols of San Francisco, California, and the United States. It has been declared one of the Wonders of the Modern World by the American Society of Civil Engineers.

The Golden Gate Bridge is a suspension bridge spanning the Golden Gate, the one-mile-wide (1.6 km) strait connecting San Francisco Bay and the Pacific Ocean. The structure links the American city of San Francisco, California the northern tip of the San Francisco Peninsula to Marin County, carrying both U.S. Route 101 and California State Route 1 across the strait. The bridge is one of the most internationally recognized symbols of San Francisco, California, and the United States. It has been declared one of the Wonders of the Modern World by the American Society of Civil Engineers.

The Taj Mahal rises out of the plains of Uttar Pradesh as viewed from Agra's Red Fort. The Taj Mahal, one of the Seven Wonders of the World, was built by Moghul Emperor Shah Jahan between 1621-1623 and required the labor of thousands of artisans.

A hammer and sickle sign at the All-Russia Exhibition Center, northern Moscow, Russia. This center was designed to show off the wonders of Socialist Soviet Russia.

Mother and daughter tourists standing in front of the Temple of Hathor at Abu Simbel, Aswan, Nubia, Egypt

Two passenger camels waiting at the bottom of the Step Pyramid of Djoser against a blue sky, the Oldest Known Pyramid, located in the archaeological site in the Saqqara Necropolis, Egyptian Burial Grounds in the Village of Saqqara, Saqqara, Egypt

Mother and daughter female tourists standing in front of the Great Pyramid of Giza, Giza, Egypt

View of the Great Pyramid and Sphinx of Giza under a blue sky, Giza, Cairo, Egypt

Two of the primary Pyramids of Giza, sunlit with a golden hue, the Great Pyramid (Khufu) under a dark, cloudy sky, Giza, Egypt

Woman With Arms Raised

Woman Worshipping By The Sea

The Colosseum In Rome, Italy

Giant's Causeway, County Antrim, Ireland, Basalt Columns

Christmas Tree Glowing Under The Northern Lights

A Close Up Look At Reconstructed Columns Of The Ephesus Ancient City Historic Site In Selcuk, Ephesus, Izmir, Turkey

A Close Up Cropped Low Angle View Of The Library Of Celsus At The Ephesus Ancient City Historic Site, Selcuk, Turkey

Camels with colorful saddles waiting for tourists with the Great Pyramid of Giza in the Distance, Giza, Cairo, Egypt

Colosseum, Rome, Italy

Grand Canyon National Park, South rim at sunset; Arizona, United States of America

The Leaning Tower Of Pisa

Closeup Of The Leaning Tower Of Pisa Tuscany Italy

Giant's Causeway, County Antrim, Ireland, Basalt Columns

Giant's Causeway, County Antrim, Ireland, Basalt Columns

Giant's Causeway, County Antrim, Ireland, Basalt Columns

Helmcken Falls, Wells Gray Provincial Park, British Columbia, Canada

Sound and light show at the Great Pyramid of Giza, Giza, Egypt