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A pilgrimage for fans of antiquity, many of Europes and indeed the worlds greatest treasures have ended up in its hallowed halls.

Guatemalas most significant Mayan ruin site, the once-bustling metropolis now gives off a haunted jungle ambience.

Most peoples impression of Petra comes from "Indiana Jones," but beyond experiencing the drama of the Siq, you can also explore the High Place of Sacrifice, the Monastery and countless tombs.

Standing just off the Great Ocean Road, a scenic treat of limestone coast, the Apostles are the cherry on a very tasty cake.

This tangled, unmappable labyrinth of 9,400 alleyways -- containing some 14,000 buildings and housing around 160,000 people dates back more than 1,000 years.

A church, mosque and museum in one, Istanbuls Aya Sofya defies easy categorization. It was built almost 1,500 years ago when Byzantine emperor Justinian I demanded a cathedral that would mimic the majesty of the heavens on earth and eclipse the wonders of Rome.

With sheer red walls set against a mountain backdrop, the palace complex dominating Granadas skyline is perhaps the most refined example of Islamic art anywhere in the world, and the most enduring symbol of 800 years of enlightened Moorish rule in medieval Spain.

The Guaran name, Big Water, is a huge understatement: these falls are so enormous, tour boats in the foaming pools below look like matchsticks to viewers from the boardwalks above.

This massive 50,000-seat amphitheater is Romes most thrilling sight, and a monument to raw, merciless power that can still be felt today by anyone who steps foot inside.

Look down at two billion years of geologic time and youll see why the mile-deep, 277-mile-long phenomenon is natures cathedral.

Acres of shimmering white marble and a few thousand semiprecious stones carved and inlaid in intricate Islamic patterns, all in perfect symmetry: this breathtaking mausoleum is architectural perfection.

Its a myth that it can be seen from space, but this awe-inspiring maze of walls and fortifications stretching for an astonishing 5,500 miles across China's rugged landscape seems both infinite and indestructible.

Its not the outrageously dramatic Andean setting, nor the way that the city clings to impossibly precipitous slopes that makes Machu Picchu so mind-blowing its the fact that no one really knows what happened here.

Stretching more than 1,860 miles up the northeastern coast of Australia, its home to the worlds largest network of coral reefs and thousands of species of fish and marine life.

The worlds greatest temple to the Hindu god Vishnu, the magnificent monument of Angkor Wat is the crowning glory of a complex of more than 1,000 temples, shrines and tombs that forms a virtual city of spires in the jungles of northern Cambodia.