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

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

In the heart of Medellín, an artsy urban complex sets the stage for demonstrations and protests.

Three hundred illuminated pillars form an “artificial forest” in Medellín.

Two identical statues by Fernando Botero, one blown to pieces in a terrorist bombing, the other donated as a gift for peace.

Home to 23 voluptuous and instantly lovable sculptures by one of Latin America's most celebrated artists.

A museum of memories in what was once one of the most violent cities in the world.

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

Located outside Medellín, this Colombian park focuses on conservation and sustainability.

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

A cozy bookstore and coffee shop in the heart of Cartagena's Old City.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

A 13th-century convent where St. Margaret of Hungary spent her teenage years.

This arch granting triumphal entrance into Antalya was designed to honor the emperor's visit.

A fountain standing as a testament to a doomed alliance.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

Quite simply the largest tree in the world (by volume).

The largest glacial erratic boulder on Cape Cod.

These three lighthouses played a fundamental role in the maritime life of Eastham.

The final resting place of the businessman-turned-astronomer who helped discover Pluto stands near his observatory.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

Crafted in 1911, this steam locomotive spent its entire working life in Flagstaff.

Giant WWII fortresses that fired 8,000 rounds a minute, now home to thousands of pigeons.