A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

One of the last remaining buildings from one of Calgary's earliest businesses.

The tallest stationary dunes on Earth also happen to sing.

Intensely colorful calcite pools in Southern China.

A fifth-century temple improbably built into the side of a cliff.

Miraculous vase predicts the future at this Tibetan Buddhist site in the Himalayas.

The abandoned site of the Beatles spiritual awakening and subsequent revolt.

An imperial fortress city that incorporated cultural elements from the entire Mughal empire, only to be abandoned the year it was finished.

A centuries-old lookout post still sits atop a natural stone spire.

A blooming house of worship for the masses.

A single tree's 2,800 aerial roots give the appearance of a complete forest.

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

Once an indicator of social class, the color blue has come to define this city on the edge of the Thar Desert.

A startling, centuries-old subterranean marvel hides in plain sight.

This ancient Hindu temple is covered in thousands of colorful statues and has a long mythological history.

A complex of six forts embedded in the Rajasthan hills.

After millennia of erosion by sand and churning water this Brazilian valley now looks like a lunar fantasy.

This metal tower in the desert provides views of a handful of Nazca geoglyphs.