A decommissioned submarine base makes a great space for graffiti art.

Disused seaplane hangar gets a second life as the jaw-dropping home of Estonia's museum of maritime history.

The ruins of an Estonian prison are drowning in the quarry lake where the convicts were once forced to work.

It was meant to help transport wounded soldiers to a secret underground hospital.

A statue of Vladimir Illyich Lenin guards this abandoned building in the "Forbidden City."

The concrete skeletons of an abandoned Swedish town hide among the trees.

This World War I fortress is the perfect place to catch a Montenegrin sunset.

An abandoned masterpiece of Soviet Brutalist architecture.

This now-defunct synthetic fuel plant was once a major cog in the Nazi war machine.

A graveyard of old and rare planes that once were the glory of Persian aviation.

The cathedral stands in New Jufa, Isfahan's Armenian quarter that was established in 1606.

One of the holiest Shi'i shrines in Iran honors the life and death of a learned noblewoman who became a saint.

This 17th-century structure is a beautiful testimony to traditional Persian architecture

This lake in northwest Iran has started turning from green to red more frequently than scientists are comfortable with.

This circular Iranian jail was once a political prison run by the country's secret police.

Named after a legendary garden called Eram in southern Arabia, built by order of Shaddad, an Arab king who wanted to compete with Paradise.

Burial site of a Jewish prophet revered in Iran.

The tower in this 1,000-year-old mud-brick village seems to vibrate for no apparent reason.

This 12,000 year old Iranian cave village has been continuously inhabited for over 3,000 years.

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

A historic trade hub teeming with gorgeous architecture, colorful goods, and vibrant designs.

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

Hundreds of stones dangle from barren trees in the middle of the desert.

A dreamy mausoleum honors Persia's most famous poet.