A small museum built by a family that survived the Siege of Sarajevo.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

A former factory now pays tribute to a local industry fueled by sardines.

A stunning silver lining to global warming's gloomy cloud.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

Oldest Museum of the Netherlands is a true cabinet of curiosities.

This military tunnel dates back to World War II and provides visitors with a little wartime adrenaline.

This World War I fortress is the perfect place to catch a Montenegrin sunset.

This top secret Chinese military megaproject is the world’s largest human-made tunnel structure.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

The largest of only eight working transporter bridges left in the world.

A fiery crater has been burning in the Karakum Desert since 1971.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.