Resonant stone, that has been played since prehistoric times.

Home to nearly a third of the world's mud volcanoes, Azerbaijan is home to a messy, bubbling, and sometimes explosive landscape.

A massive collection of petroglyphs dating back some 40,000 years.

Mysterious hillside with a continuously burning natural fire.

A shrine of fire worship built on top of a natural flame.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

This colorful and quirky set of pegasus sculptures celebrate the works of poet Zbigniew Herbert.

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

A dismembered holy head stares out from her beautiful reliquary at the St. Dominic Basilica.

The middle finger of modernity.

One of the largest squares in Europe contains an entire artificial island.

The severed head of a 17th-century Irish martyr lies within an intricate golden shrine.

The incorrupt tongue of the patron saint of lost things is venerated in this basilica.