Living fossils in this remote Australian bay provide a glimpse of what Earth may have looked like 3.5 billion years ago.

This Australian beach is composed of tiny shells.

Aqua white sand highlighted with fiery red rocks.

One of the best beaches in the entire world.

Incredible rock formations jut from the southern end of this spectacular stingray-viewing spot.

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

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

The Pope’s secret escape route.

2300-year-old Roman road connecting the empire.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

Architectureal fantasy quarter of Rome.

An alchemist's "magic door" stands in the middle of a Roman park.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

Artifacts and memories from the Vietnam war, located in a place that experienced it first hand.

A nightmare for the claustrophobic lies hidden in Southeast Asia.

An extravagant monument to an extravagantly unpopular Emperor.

In the world's most bombed country relative to its size, this incredible organization helps pick up the pieces.

An ancient jungle temple carved into a rocky overhang of the Dane Soung Plateau.

Thousands of effigies of Buddha watch from caves set high above a legendary river, plus whiskey.

A small 12th-century temple surrounded by waters believed to have curative properties.

This collection of reclaimed landmines acts as both an exhibition of their deadly history and as a shelter for children affected by them.

One of the biggest markets in Asia, under one of the continent's largest domes.