The fire inside this temple has burned for more than 1,500 years.

17th century mosque for Shah Abbas' harem.

The hottest, driest, and most scenic desert on Earth.

Modern-day cave dwellers carve elaborate homes out of volcanic debris.

Putrefaction plateaus in Iran, where the dead were sent for decontamination before going to their final resting place.

A spectacular rainbow of stained glass makes the "Pink Mosque" one of the most beautiful in Iran.

The palace of the King of Kings, burned by Alexander the Great.

A wealthy aristocratic family built this Disney-worthy, fairy-tale castle.

A massive tribute to Estonian history and culture.

Its collection offers a glimpse into the Russian Old Believers' centuries-old way of life.

This little gem in the Gulf of Riga has a very rich heritage and distinct culture.

This peculiar border irregularity is the only way to legally enter Russia without a visa.

Man-made mineral caves house massive bat colony.

"There's nothing there," and other lies the KGB told us.

This celebration of Latvia’s freedom and independence avoided demolition over half a century of Soviet occupation.

This former Nazi labor camp is now a poignant memorial, complete with giant Soviet-style monuments.

A top secret Cold War bunker hidden beneath a Latvian spa facility is now open for tours.

3,000 market stands in five former Zeppelin hangars.

A former Latvian headquarters of the brutal KGB secret police is now open as a grim reminder of their atrocities.

Flamboyant architecture from the turn of 20th century.

The oldest housing complex in Riga is a mini timeline of architectural trends.

Discover the car that once belonged to the King of Nepal in a former Soviet-era taxi park.

Rub it for a bit of good luck.

This lonely Lithuanian chapel looks more beautiful and haunting in decline than it ever did in life.