Intensely colorful calcite pools in Southern China.

A total of 999 stairs lead visitors through a massive hole in a mountain known as the Gateway to Heaven.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

The second-longest continuous wall on the planet protects a hidden secret in the deserts of India.

A mecca for India's Jains.

A towering work of stone and philosophy that was constructed using ancient Hindu science.

World's tallest monolithic statue has served as a pilgrimage site since its completion in 993 CE.

An ancient stone fortress considered by many to be the eighth wonder of the world.

The remains of what was, not so long ago, the world's largest city.

This complex of vertically-excavated Buddhist, Jain, and Hindu monolithic temples in India's Maharashtra providence illustrates a spirit of tolerance characteristic of ancient India.

At 8,000 feet, the world's highest tea estate draws visitors for both its products and its panoramic views.

Modest by day, illuminated majestically at sunset.

Spring that emits water and fire at the same time is said to have remedial properties, and sparked its own religion.

Complete town of 5,000 living out at sea on the world's first offshore oil platform.

Mysterious hillside with a continuously burning natural fire.

A gleaming white and undulating tower marks the border between Georgia and Turkey.

Single runway interrupted by a busy road that cuts across its middle.

Traditional 11th-century outdoor tannery.

Walk 2,300 feet above the ground on the "Troll's Tongue."

A thin pane of glass keeps visitors from sliding off this futuristic skywalk.

Swedish skyscraper with a 90° twist.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Opulence and fantasy collide in this royal chair which is supposedly made with unicorn horns.

Copenhagen's celebrated theme park and gardens.