One of the tallest mountains in India was closed for years after a botched CIA mission.

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

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

Space-age minarets towering over Islamabad.

A mere stone's throw from Islamabad exists a spectacular display of three millennia of humanity's progress.

A city entirely devoted to illegal gun production.

The bluer than blue waters in these natural Israeli caves are reached via the world's steepest cable car.

Modern museum, designed for Jihadi tourists.

The largest hewn stone in history.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

Isolated atop this Balinese sea crag is a lovely Hindu temple that is said to be guarded by sea snakes.

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

This $62 million dollar temple was erected to house one little dental fragment of religious history.

Malaysia's first and only glass temple.

Twice a day one of these tragic bronze mariners drowns with the tide to remember all those the sea has taken.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

The Old Mill shown in the opening credits of “Gone With the Wind” is actually fairly new, and was never a mill at all.

Cathedral carved out of salt, located a mile below the Earth's surface.

The glacier tucked within a New Zealand rainforest.

An opal mining town in the middle of Australia where people live, worship, and shop underground.

Nine limestone rock stacks on Australia's "Shipwreck Coast."

A clear example of the process of erosion in action.

The largest collection of Indigenous Australian artifacts in the world, and the rare museum where wood-and-glass cabinets have trumped interactive exhibits.

This eccentric cave dwelling is bizarre even by the standards of a subterranean town.