Outdoor escalators and art have helped change what was once a notoriously dangerous part of Medellín.

In the middle of one of South America's most historic walled cities lies a bar with an enormous collection of Soviet memorabilia.

The colonial city's social history is reflected in its fanciful door knockers.

This elegant Colombian fortress was one of the torture headquarters for the Spanish Inquisition.

A 10 million-ton rock once worshiped by the Tahamies Indians, accessed by an astounding staircase.

The Andean town where every single building is decorated with a brightly colored frieze.

A bright little alley in La Boca is a part of tango history.

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

This stunning mass of ice spans 121 square miles and is still growing.

Hundreds of Buddhas in a re-discovered Indonesian temple.

A sprawling nature preserve harbors the world's only living dragons.

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

This beautiful 16th-century necropolis marks an astonishing feat in heritage conservation.

Many Hindus make the long pilgrimage to this holy city to have their remains burned on the banks of the Ganges River.

The mysterious empty cupola behind the monumental arch points to an ancient prophecy of Delhi.

This opulent 16th-century Maharaja’s palace is a unique mix of Hindu and Muslim designs.

The evocative ruins of a 1,000-year-old hill fort lie within a popular tiger reserve.

The abandoned site of the Beatles spiritual awakening and subsequent revolt.

An imperial fortress city that incorporated cultural elements from the entire Mughal empire, only to be abandoned the year it was finished.

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

More than half of this Indian palace is drowned but it looks all the more spectacular for it.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.