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

The largest market in Guyana, designed and built by the Edge Moor Iron Company of Delaware.

Georgetown’s most impressive building is also one of the tallest wooden churches in the world.

The world's widest single drop waterfall, and the two men who legend says went over its edge in a boat.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

This stunning concert hall has become a symbol of Iceland's national recovery.

The largest whale museum in Europe allows visitors to walk among life-size giants.

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

Medicinal spa created from the mineral-rich runoff of a geothermal power plant

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

An abstract monument to a symphonic composer.

A marvel of Byzantine engineering under the streets of Istanbul.

A scenic UNESCO site that doubles as a habitat for various forms of wildlife.

Monasteries on rock pillars, once accessible only by frayed ropes.

The hallucinogenic center of the ancient world.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

A stunning Catholic cathedral built by a curve-loving communist in Brazil’s newly created capital.

One of São Paulo's tight urban intersections has become a haven for graffiti artists ever since a single Batman started the trend.

The Vermont grave of a 4,000-year-old mummy prince.

The first car-centric shopping plaza in the U.S. brought a little bit of Spain to downtown Kansas City.

Four, 18-foot-tall badminton shuttlecocks lie scattered about the lawn of a Kansas City museum.

A wonderful collection of all things Oz is nestled in the heart of Kansas.