Singapore's landscaping project is home to 18 incredible Supertrees.

A battle between nature and architecture in the Cambodian jungle.

Though it was originally dedicated to the Hindu god Shiva, Baphuon was converted to a Buddhist temple in the 15th century, complete with a massive hidden statue.

Thousands of abandoned statues of deities are taken to this hillside in southern Hong Kong.

The most famous location in China was home to whole dynasties worth of imperial rulers.

This smaller cousin of the Forbidden City has gone from ancestral sacrifice to tourist's whispers.

This probably wasn't what Mao had in mind.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

Built by a king and rebuilt by an emperor, this aqueduct transported water for 1,200 years to this ancient Mediterranean hub.

The world's oldest bookshop still in operation.

This unique architectural wonder is also tied to one of the 20th-century's most renowned writers.

A Milanese café entirely designed by the American director Wes Anderson.

A space dedicated to contemporary art and culture, co-chaired by fashion icon Miuccia Prada.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

This structure atop a craggy cliff in one of the most beautiful parks in Paris boasts an unbeatable view.

Huge stairway leads to this massive gallery.

A museum dedicated to traditional Armenian clothing and their designer.

One man’s collection of photography books has transformed into a charming exhibition space.

A geological oddity topped with a 2,000-year-old pagan temple.

This Armenian monastery was carved out of cliffs and named after the spear used to stab Jesus.

This medieval manuscript collection has some of the most obscure and ancient texts in the world.