Flames have been burning within this mountain for more than 2,500 years.

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

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

A Turkish ghost town abandoned in a population exchange with Greece.

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

A marvel of Byzantine engineering under the streets of Istanbul.

Roman ruins top white travertine terraces formed by ancient hot springs.

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

The soaring gondola lines form the longest aerial cable car system in the world.

A massive display of meteorites all found in the Atacama Desert.

Walk on a glass floor suspended over ancient mummified remains.

One of the largest ancient geoglyphs in the world is a tall desert god used for predicting the weather.

The large collection of pre-Columbian pottery might make you blush.

This geometric feat is a testament to the Incas' mesmerizing architectural abilities.

Situated on a sacred Inca site, this 16th-century cathedral took nearly 100 years to build.

Built on the remains of one the Incas’ most important gathering spots, this square keeps the spirit of a fallen empire alive.

This 16th-century monastery was founded to cloister the daughters of wealthy local families.

A powerful tribute to the victims who suffered under Ethiopia's most devastating regime.

This mysterious complex of abandoned yurts and fading murals was meant to be a center of science and spirituality in Kyrgyzstan.

Giant cauldrons overflow with Uzbekistan's favorite rice dish at this cavernous dining hall.

This river island in Sierra Leone is home to impressive biodiversity and the country's first community conservation program.

Also known as the Blue Church, the building was consecrated to the daughter of Andrew II.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.