Unusual building appears to be haphazardly built from randomly piled bricks.

Take respite inside this jaw-dropping church while climbing the volcano where Georgia's Prometheus was once chained.

You'll find just about anything in this funky Tbilisi flea market.

Small church on top of a huge rock column.

The charmingly disheveled clock tower of Tbilisi's puppet theater.

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

The building's fluid, wavelike walls are a true feat of architectural ingenuity.

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

Spring that emits water and fire at the same time is said to have remedial properties, and sparked its own religion.

Resonant stone, that has been played since prehistoric times.

A unique museum dedicated to culture and artistry of carpet weaving.

A gigantic collection of teeny, tiny books.

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

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

Mysterious hillside with a continuously burning natural fire.

A decaying, yet still functioning, work of communist architecture.

Sofia's legislative center is continuously reinventing itself.

A vast Communist-era exhibition space in the Bulgarian capital.

This ancient theater, restored in the 20th century, lives on as a venue for dramatic and musical performances.

A striking symbol of the Bulgarian capital.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.

This historic black and white monastery is one of Bulgaria's architectural jewels.

An abandoned saucer-shaped monument in the Bulgarian mountains.