A monumental underground karstic wonderland is also the water source for over a million citizens of Beirut.

The largest hewn stone in history.

Ecuador’s historic seat of government has been quietly looted in recent decades, and no one knows how or by whom.

Quito's historic, main square dates back to the 16th century.

The world's tallest aluminum statue is also the world's tallest image of a winged Virgin Mary.

Legend says if this neo-Gothic basilica is ever officially completed, the world will come to an end.

It took 160 years to complete the most ornate church in Ecuador.

An elaborate shrine dedicated to the four corners of the world unfortunately misses its mark.

These mammoth-yet-narrow crevasses in the Earth are perfect for taking an otherworldly swim.

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

The Avenue of Mausolea is a series of grand palatial tombs.

Space-age minarets towering over Islamabad.

Tibetan-influenced mountain fortress in Northern Pakistan.

Known as the most dangerous bridge in the world, the Hussaini Hanging Bridge is only one of many precarious rope bridges in Northern Pakistan.

This dazzlingly turquoise mountain lake was created in the wake of a natural disaster.

One of the oldest theaters in Australia, it's also said to be haunted by a performer who died on stage.

One of Australia's famed "Big Things," this giant fruit was once stolen as part of a publicity stunt.

This trio of Australian rock spires may have inspired aboriginal legend or just modern tourism.

A massive stairway that almost wasn't leads to one of Australia's most scenic vistas.

A small, but award-winning beach known for its literally spotless reputation.

In Namibia there is an installation that explores the intertwined linguistics and existential beliefs of an imaginary community.

Held in a fort that once stood for colonization of the area, this museum now tells the history of its indigenous people.

Road signs in Namibia mark the location of one of the five major circles of latitude.

A salt lake dotted with steaming limestone chimneys.