The industrial monstrosity known as Bagger 258 is a colossal mining machine built in the DDR - but now left for dead in a German field.

Ruins of a German Castle on top of a towering stone pillar.

Bohemian paradise covered in majestic forests.

Underneath this small church are 15,000 bones, arranged by an obsessive academic.

Looming communist pillar with a Czech twist.

An underground city of salt.

Artfully arranged bones of 5,800 Austrians.

Europe's second largest ossuary wasn't discovered until 2001.

The house that took a plunge into the facade of a museum.

Giant WWII fortresses that fired 8,000 rounds a minute, now home to thousands of pigeons.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

A spherical "micro-nation" in the heart of Vienna.

Apartment complexes built into huge repurposed natural gas tanks.

Museum dedicated to the terror regimes of Hungary.

Once the home of a hermetic monk, this cave now houses a small church.

Hungarian mummies in beautiful painted coffins.

A Hungarian pharmacy museum with a box full of mummy powder.

Right angles in the forests of Panama.

An old slave lookout in Cuba's historic sugar cane fields.

Former WWI oil tanker played a variety of roles in history, its tantalizing rum-flavored scent being the only constant.

A nuclear power plant abandoned along with an international allegience.

An Australian lake whose pink hue defies scientific explanation.

WWI hospital ship lost in a cyclone turns up on the coast of Fraser Island, where she remains rusted and forgotten.

This dramatic sea spire is home to the world's rarest insect and is part of the lost continent of Zealandia.