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

Nearly three tons of weapons from the Vietnam War still remain in this small, hidden museum.

This historic spot was where America's involvement in the Vietnam War officially came to an end.

A memorial to the monk who set himself on fire to protest the persecution of Buddhists in Vietnam.

India’s only Brain Museum displays over 200 fascinating ways that your brain might kill you.

Planned as the world’s first zero-carbon city, it had lofty ideals—but is only 5 percent completed and aiming for 50 percent carbon-neutral.

Whitewashed mosque contains the world's largest carpet.

This massive piece of artwork weighs more than 250 tons, and was designed as a tribute to the first president of the United Arab Emirates.

In the middle of a Vienna square, Roman ruins dating back some 2,000 years are on display.

A museum dedicated to traditional Armenian clothing and their designer.

The luxurious circular mansion built for a Communist leader now lies abandoned.

This modern tandoor eatery was once a canteen for Soviet farmers.

She asked for a potato cellar and over the next 23 years he gave her a network of holy caves.

This often-missed monastery, set in a scenic mountain landscape, features unique frescoes, fortifications and legends.

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

A geological oddity topped with a 2,000-year-old pagan temple.

This Armenian monastery was carved out of cliffs and named after the spear used to stab Jesus.

A wooden dock art installation on Chiloé Island taps into the island's indigenous mythology.

Spanish religion mixed with local architecture has yielded a network of churches unlike any other.

This fairytale house on the shore of a Chilean Lake oozes an eclectic mix of Chilote and German Cultural heritage.

Foreign invaders almost left this lovely Caucasus palace alone—almost.

This medieval fortress is (or was till 2017) the home stadium of the football club FC Duruji Kvareli.

This little medieval church hidden in the center of Yerevan was lost and rediscovered—twice.

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