One of only two towns in Israel populated by Circassians, a sect of Sunni Muslims who are also devoted to Israeli military service.

This dome-shaped mountain boasts amazing views and has a rich religious history.

Pilgrimage site for star-crossed lovers.

This 6th-century church has the largest and best-preserved collection of Byzantine mosaics outside Constantinople.

An incredible mosaic-lined monument said to have held the remains of an ancient Roman empress.

The smaller of the three towers of San Marino is a former prison inaccessible from the ground level.

This Nazi ruin was the site where Hitler was almost blown up by a suitcase bomb.

This 13th century Gothic brick castle is the largest in the world by surface area.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

Colorful and chaotic stacked hotel in North Holland.

The place where Czar Peter I of Russia resided in 1697 during his Grand Embassy.

Famed for its pie, this eatery has a hidden tunnel that allowed Catholics to secretly walk to church during the Reformation.

A closer look at this somewhat faded hotel by the Corinth Canal reveals the architectural undertones of a genius.

Over time, this castle grew to encompass the entire island.

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

The secret meeting held in this building would forever change the world.

A beautiful and moving memorial set on a little island in the middle of the river in Minsk.

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

A striking symbol of the Bulgarian capital.

Sofia's legislative center is continuously reinventing itself.

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

Mysterious standing stone formations looks like a petrified forest.

The deepest underground city in Turkey was designed to protect 20,000 people behind massive stone doors.

In this historic region, homes and churches are carved into ancient volcanic rock formations.