Enter the cabin of a life-sized Hindenburg replica.

This museum tells the story of lake dwellers from 4000 BC to 850 BC, replete with stilt houses and goats.

Visitors may notice something strange walking through this quaint German town.

A remarkable two-country morph, this town is part of Germany legally but is by all other measures Swiss.

Switzerland's oldest public observatory is an important part of the Zurich cityscape.

Use a key to unlock this medieval sewer tunnel.

This massive boulder was hurled into a Zurich church when a gunpowder depot was struck by lightning in 1652.

The hidden lair of an alchemist rediscovered in a 2002 flood.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

A series of playful yellow penguins share a serious message about the environment.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

Macabre astrological automaton clock dating to the late 1400s.

A significant example of Czech cubist architecture—a style you won't find anywhere else in the world.

What looks like a suicide in progress is actually a statue of Sigmund Freud.

A church of bones, decorated with 40,000 human skeletons.

The beautiful, ornate weather station is the most popular geocache in Salzburg.

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

Take a hike to this unique rock formation formed by lava flows.

One of the biggest Buddhist stupas in Europe, hidden from most locals.

A vibrant street away from the typical tourist track, lined with colorful, mosaic-covered houses.

105-foot wide giant metallic flower blooms anew every day in the heart of Buenos Aires.

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

These 400-year-old ruins are all that's left of the monastery where Ines de Castro was assassinated by the King of Portugal.

The "Little Ones," show Portugal in full miniature splendor.