When the rain falls, this drain system turns into a musical instrument.

Enormous sandstone towers loom within a Czech forest.

What looks like a crashed Zeppelin is actually a bright, airy reading room perched atop a modern museum.

The oldest garden in Prague, once part of an medieval orchard.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

This automated sculpture of two men peeing will spell out text messages with their micturition.

A half-buried vehicle in Prague's is the latest iteration in a long-running piece by Czech artist David Černý.

A series of playful yellow penguins share a serious message about the environment.

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

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

The world's tallest palm trees look like the whimsical kind of plant you'd find in a Dr. Seuss story.

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.

This picturesque mansion has gone from opulent ruin to nature museum.

The shipyards along the outskirts of the Bangladesh capital are a flurry dangerous boat breaking and rebuilding.

Ancient and modern architecture are joined in Louis Kahn's monument to democracy.

Where giant ships go to die.

Space-age minarets towering over Islamabad.

One of the last surviving ancient Buddhist sites in the region, it escaped the brunt of several Hun invasions thanks to its remote location.

A mere stone's throw from Islamabad exists a spectacular display of three millennia of humanity's progress.

A 17th-century mosque that was used for war more than worship.

These stairs were built to accommodate royals mounted on elephants.

This lost city belongs to one of the earliest civilizations in the world.

The world's second largest salt mine, said to have been discovered by Alexander the Great's horse.