The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

These enormous, stern-faced statues greet visitors with lanterns, and sometimes costumes.

This church also serves as a lighthouse complete with a beacon.

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

The last surviving submarine from a strange chapter of Finnish history.

This extensive collection covers thousands of years of Polish military history.

An artificial date palm stands as a memorial to Warsaw's Jewish community.

The Polish capital has had a deep connection to its guardian mermaid for almost a millennium now.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

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

This boat represents the promise of undiscovered territory, a dream of hope, and progress and freedom for Iceland.

An architect's childhood fantasy treehouse made real.

The last physical evidence of the Lewis and Clark trail is one of their autographs etched into this giant rock.

A memorial to the most decisive Native American victory of the Plains Indian War.

A Red Cross memorial museum at the site of the Niš concentration camp that operated for four eventful years during World War II.

This memorial park stands on the site of one of the largest mass executions of the Second World War.

Structure built from the skulls of vanquished foes.

A memorial to victims of the Oklahoma City bombing.

Often mistaken as a medieval Gothic monument, this unique cornerstone only dates back to the 1980s.

An ode to a soldier who came to town, fell in love, then began making his own sparkling wine.

The inverted pyramid design of this station stands out amid Bratislava's urban landscape.

The largest fountain in Bratislava.

Launched by Napoleon's soldiers more than 200 years ago, a cannonball remains embedded in the tower wall.