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

The ancient latrines of the Greeks, in all their public glory.

Roman ruins, natural methane fires and a lovely beach.

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

One of Western Africa's oldest mosques, this Timbuktu icon has stood for nearly 700 years.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

This representation of Lord Vishnu is the largest stone sculpture in Nepal.

The oldest Hindu temple complex in Nepal serves as the seat of Nepal’s national deity, Lord Pashupatinath.

Towering at a height of over 30 meters, this turn-of-the-18th-century landmark is the tallest temple in Nepal.

The former stronghold of the Malla Dynasty has remained virtually unchanged since the 17th century.

This historic square in Nepal is home to temples dating back to the third century.

Jumping-off point for a climb up Mt. Everest is the most dangerous airport in the world.

Last stop before the top of the highest peak in the world.

Nailing a coin to this holy stump is just another way to ask the gods for relief from dental pain.

A Himalayan monastery claims to have a piece of a centuries-old abominable snowman.

One of the largest Buddhist stupas in the world keeps an eye out in every direction.

This elegant neoclassical garden is a peaceful oasis in the middle of the Nepalese capital.

Sacred Buddhist home of some spiritual monkeys.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

If you’ve ever seen a picture of Machu Picchu, then you’ve seen a picture of Huayna Picchu—you just didn’t realize it.

A backdoor to Machu Picchu that only the most foolhardy infiltrator would attempt to breach.

These steeply terraced ruins are a stop along the Inca Trail to Machu Picchu.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.