An abandoned mine pit is now a beautiful, colorful attraction.

After several weeks of radio silence, this abandoned oil tanker washed up on a remote beach in Liberia.

Empty since 1989, now falling into ruin.

The ruins of an abandoned crematorium haunt an eerie deserted German cemetery.

A Turkish ghost town abandoned in a population exchange with Greece.

St. Mary's Asylum was isolated and abandoned before being converted into a Bed and Breakfast.

A train station that was abandoned by the coal industry and was later converted into a cocktail bar.

A recently abandoned psych ward at the end of Sanatorium Road.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

Peek inside restored planes at this off-the-beaten-path collection of aviation archaeology.

This former Cyprus flight hub is now a crumbling, abandoned ghost complex.

Naturally formed rock city in Poland.

This hidden collection of everyday objects illustrates life within communist Poland.

This man-made mound monument was built out of soil from all across the Polish empire.

Poland's oldest surviving university building holds a wealth of historic science instruments including some used by Copernicus.

Warsaw's fantastically preserved gasworks...almost.

This 700-year-old structure is one of the most unique architectural and historic monuments in Gdańsk.

This Nazi ruin was the site where Hitler was almost blown up by a suitcase bomb.

A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

The site of the first battle of World War II.

A program of Communist glamour in post-Stalin Poland is preserved in this colorful museum.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.