Preserving the research tools, unexpected inventions, and odd collections of generations of college professors.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

Museum preserving torture methods from the past.

Home to 10,000 medical specimens including the remains of Rudolf Virchow's extensive collection of pathological specimens.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

This modest marker near Notre Dame identifies the very center of Paris.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

The first botanical garden, a feather in the cap of the Grand Duke of Tuscany.

This bustling Italian plaza is built on the ruins of an ancient Roman amphitheater.

Fortified medieval tower house with lovely roof garden.

Austria's ultra-modern art museum looks like Cthulhu's giant alien heart.

Fantastic stories on a miniature railroad.

The world's largest historic armory was established by independent citizens to defend themselves from the wars of larger forces.

Resting in the middle of an Austrian river, this sci-fi "island" lets people cross in neon style.

Its collection details the experiences of the largest Japanese community outside Japan.

This "Little Finland" started as a Finnish utopian society in Eastern Brazil.

This striking, two-toned confluence of rivers is visible from space.

This singular art museum in São Paulo is unique inside and out.

This park feels like a lush little jungle full of wildlife nestled within São Paulo.

A jungle in the heart of São Paulo reminds visitors of what Brazil looked like untouched by man.

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