An unusual and beautiful form of mass transit serves the city's steepest neighborhoods.

This Bogotá museum houses the world's largest collection of pre-Columbian gold relics.

Pilgrims each carried a brick to the top of Mount Monserrate to help build this historic sanctuary in Colombia.

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

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

Moscow's imposing monument to the Space Age.

Museum celebrating the achievements of the Soviet space program.

An early-20th-century "dacha" village of quaint cottages curiously located in a modern part of Moscow.

Moscow's other, lesser known kremlin is a fairytale-like cultural complex modeled after Old Russia.

An unexpected desert oasis in South America.

A monument to the conquistador became increasingly controversial in the very city that he founded.

Visiting dignitaries and Hollywood stars once stayed at this 1920s hotel, alongside ghosts that are said to haunt its corridors.

The little bear in the "funny kind of hat" has made his way from London back to Peru.

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.

The remains of what was the most important religious complex in coastal Peru for over a millennium.

This bullring in Lima is the oldest in the Americas and the second-oldest in the world.

A small, emotionally charged room inside the Mario Testino Museum dedicated to Princess Diana and one famous photo shoot.

Now containing the bones of the actual conquistador, instead of someone else.

This stone complex marks the urban center of a lost civilization.

A pretty park of over 1,600 olive trees that grew from just three saplings brought over from Spain.