Egyptian Revival movie palace abandoned for decades and restored in 2013.

This salt marsh in Southern France is as pink as the flamingos that inhabit it.

This natural French spring has been turned into a magical grotto by Roman and medieval constructions.

Sacked by Vikings, blessed by William the Conqueror, dealt a fatal blow during the French Revolution—these ruins have seen it all.

A chapel on a volcanic core, marking the end of a successful journey.

This French castle is said to have once held the Holy Grail but is now a gorgeous mountaintop ruin.

Museum in a swimming pool where the water still flows.

These crumbling Nazi artillery bunkers are now fair game for massive graffiti projects.

An abandoned Cambodian resort that mirrored the downfall of the country as it was happening.

A palace destined to never house a king.

A former French military respite turned jungle tourism hotspot.

The world's largest ship graveyard is the product of decades of corruption.

Once at the center of U.S. finance, the historic Trading Room was meticulously recreated piece by piece and rebuilt in the Art Institute.

Yemen's "Stone Palace" looks like it was carved right out of the tall stone column on which it is built.

An Ethiopian "Jerusalem" featuring a church hewn out of a single rock.

The most visited pilgrimage site in Armenia once held a saint in a pit for 13 years.

Take respite inside this jaw-dropping church while climbing the volcano where Georgia's Prometheus was once chained.

A cylinder monument with a spectacular vista commemorates a friendship that some say never existed.

This ancient abandoned church in a remote part of Turkey is in danger of falling over.

Remnants of successive wars and Muslim colonialism in the 11th century.

The most alien-looking place on Earth.

This ancient village and its adjoining cemetery have a beautiful history of death and remembrance.