Meant to be a lavish presidential home, the palace became a symbol of the fall of South Vietnam.

This French colonial post office is arguably the grandest in all of Southeast Asia.

Watch butterflies take flight before you fly.

Malaysian fireflies create a dazzling display as thousands light up in unison.

Holy Hindu shrine in an enormous, monkey-filled limestone cavern.

After being bombed and largely abandoned, this former railway workshop has been transformed into a lively market space.

Cartoon clouds and nature-inspired murals have transformed the streets of Kuala Lumpur.

One of the world's tallest flagpoles.

Kuala Lumpur’s historic single-screen cinema, transformed into a labyrinthine bookstore.

An ancient stone fortress considered by many to be the eighth wonder of the world.

This elaborate temple was built around one of the Buddha's teeth.

This fort dates back to 1588 and was colonized by the Portuguese, Dutch, and English and sits prominently on the Indian Ocean where azure water lap the coast.

This large Roman bath complex offers a window into ancient life in the arid Central Anatolian steppe.

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

This Soviet statue is based on a piece of propaganda that's been elevated to national myth.

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

Once a bustling fishing port, this semi-ghost town is now more than 90 miles away from the shore.

This dark, damp, perilous tunnel is the only passage from north to south Tajikistan.

This retro, UFO-like structure is a remnant of the Soviet-era circus.

Where you'll find anything but nothing.

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

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

Underground monastery and fortress.

The celebrated eyesore created by starry-eyed sweethearts.