Sofia's legislative center is continuously reinventing itself.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

A fountain standing as a testament to a doomed alliance.

Ancient serpentine sacrifice holder that has stood the test of time.

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

Turkish adventurer antiques in the heart of the Grand Bazaar.

A marvel of Byzantine engineering under the streets of Istanbul.

This 1000 year old relic-filled cave monastery and UNESCO World Heritage Site also hosts an amazing micro-miniature museum.

"Holy Wisdom" overlooks the city that became its namesake.

A striking symbol of the Bulgarian capital.

An underground magnet for ever-changing street art.

One of the world's largest automobile junkyards is a unique landscape of metal and moss.

A fortified city, home to a remaining population of five families

A mud brick kasbah with a history of lavishness and traitorship.

A turquoise lake within a volcanic crater.

The most visited pilgrimage site in Armenia once held a saint in a pit for 13 years.

This Armenian monastery was carved out of cliffs and named after the spear used to stab Jesus.

A geological oddity topped with a 2,000-year-old pagan temple.

A stunning 18th-century site where pilgrims ascend by a series of punishing stairs only to return via funicular.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

This underground church is topped with a 500-foot cross that is seen by many as a beacon of fascist hubris.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.