The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

Death rituals and sacrifice inside a Peruvian megalith.

Eat a meal surrounded by bomb fragments.

Ha Long Bay's "Cave of Surprises" houses a popular phallic rock formation.

The Buddhist temples of Yamadera, built into a mountain side, feature a viewing deck with sweeping views.

A huge communist-era propaganda monument and mural that offers stunning views of the Mongolian capital.

Hindu temple of the dead home to hundreds of long-tailed macaques.

The world's second-largest sundial, made entirely out of stone.

An ancient iron pillar in Delhi that seems to be rustproof.

Named after the Goddess of Harvests, Annapurna is the deadliest member of the Eight-thousanders club.

A 17th-century mosque that was used for war more than worship.

Space-age minarets towering over Islamabad.

A city entirely devoted to illegal gun production.

Rock-cut chamber at top of an outcroup, reached by a mountain stairway of forty steps.

Highly unusual subterranean stupa and adjacent cave monastery.

Once an impressive link to Afghanistan’s Buddhist past, now a sad reminder of intolerance towards other cultures.

The West's first incursion into the Afghan world lies buried beneath a military base.

Tibetan-influenced mountain fortress in Northern Pakistan.

This legendary city has been a tourist attraction for centuries.

Splashes of blue in an otherwise monotonous lunar landscape.

200-foot-high minaret and only remnant of Afghanistan's lost city of the Turquoise Mountain.

Believed to have once stored either human remains or rice wine, thousands of mysterious stone jars lie in ruin.

Sacred Buddhist home of some spiritual monkeys.

This "tower of death" has acted as an observatory, a religious hub, and an executioner's lair.