A memorial to the monk who set himself on fire to protest the persecution of Buddhists in Vietnam.

A wall of chewing gum moonlights as collective art.

A colorful architectural gem in Seattle’s uniquely modern Central Library.

Some of the best-preserved specimens of the monumental medieval tombstones found throughout Bosnia and Herzegovina.

This ironic war memorial thumbs its nose at a campaign of inedible humanitarian aid food products.

This enormous abstract sculpture is part jungle gym, part elaborate noise-making machine.

This picturesque monastery at the base of a cliff is a peaceful oasis open to all visitors.

The sad remains of a monument to martial arts legend and movie star Bruce Lee—in the middle of Balkans.

A former bank seized as a sniper vantage point during the Bosnian War is now a secret graffiti art gallery.

A musical instrument played by the sea.

Now harmless, this looming post struck fear into the heart of medieval troublemakers.

This narrow fjord-like bay is the largest ria in the Mediterranean Sea.

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

A relic from the Industrial Revolution got a second life as a contemporary performing arts space.

A trough of 700 strange bronze faces runs through a narrow alley in Ljubljana's old town.

In between two buildings in Ljubljana, medieval tunnel to nowhere.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

The site of the climactic scene from the classic horror film is now a historic landmark.

The Corinthian columns that towered over Abraham Lincoln’s inauguration stand proud.

This ruined quarry once produced the distinctive red sandstone used for construction projects in Washington, D.C.

These unusual rooms on wheels are holdovers from the 1960s.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.