The Avenue of Mausolea is a series of grand palatial tombs.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

This "tower of death" has acted as an observatory, a religious hub, and an executioner's lair.

In Kazakhstan, a colorful cathedral with many lives once survived the most powerful earthquake in the region.

Nicknamed Kazakhstan's Grand Canyon, this natural wonder lies east of Almaty near the Chinese border.

This unique wooden mosque resembling a Chinese pagoda was said to be built without the use of nails.

A brilliant turquoise lake in the mountains.

Submerged trees jut ghost-like out of an idyllic turquoise mountain lake.

Now harmless, this looming post struck fear into the heart of medieval troublemakers.

A musical instrument played by the sea.

Explore a traditional Albanian dwelling that pays tribute to the region's rich history.

Armenia's premier center of astrophysical research was established during the Soviet era.

Called the "Armenian Stonehenge," this ring of menhirs pierced with holes may be a prehistoric astronomical observatory.

Nestled in a peaceful valley, this Armenian monastery may have been saved from Mongols thanks to the eyes of God.

This medieval manuscript collection has some of the most obscure and ancient texts in the world.

This ancient monastery complex was transformed from an island to a peninsula when the lake was partially drained.

The world's longest nonstop reversible cable car soars through spectacular scenery to the medieval Tatev Monastery.

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

After visiting hours, this picturesque waterfall is essentially turned "off" to be used for hydroelectric power.

Right up until the 20th century this network of man-made caves was the biggest village in Eastern Armenia.

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.

Known as "Toronto's Flatiron."