Three wildly colorful calderas top this otherworldly volcano chain.

Inside this Krakow church, an explosion of psychedelic color.

This seaside pine grove features an exclusive watchtower that presents amazing views.

A miraculous three-handed portrait of a saint can be found inside this church.

A sculpture of graceful storks sits atop this fountain in Independence Square.

340-foot statue built to honour the Heroes of the Soviet Union.

On La Gomera, "Silbadors" communicate in a 4,000-word language of whistles.

This mysterious but iconic tapered tower appears in many Azeri fairytales and legends.

Centuries before the modern seismograph, Armenian monks measured quakes with this tilting pillar.

With over 10,000 lights, this engineering marvel lights up the city after dark.

Ruins of a former government building destroyed during the Georgian-Abkhaz war in the wake of the fall of the Soviet Union.

Some call this eerie forest of crooked trees the "Bermuda Triangle of Romania."

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

One of the best collections of wax anatomical models in the world.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

Fortified medieval tower house with lovely roof garden.

A striped 12th-century basilica sits in the countryside of Sardinia.

The birthplace of Karl Marx is now a museum dedicated to the communist revolutionary's life and work.

Some believe that the artist behind this whimsical statue inserted his own likeness as a way to discreetly flip the bird.

A little sculpture with a large wardrobe.

Giant cauldrons overflow with Uzbekistan's favorite rice dish at this cavernous dining hall.

At 72 feet below sea level, it's the lowest commercial airport in the world.

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

Hundreds of prehistoric stones, arranged in perfect lines in a French field.