Apartment complexes built into huge repurposed natural gas tanks.

The resting place for anonymous victims of the Danube's dark waters.

This grand manse has been transformed into a museum devoted to one of the founders of Fantastic Realism.

Located right outside of Vienna, visitors can take in expansive views of an ethereal forest.

This cubist Vienna church building looks like some sort of alien stonehenge.

Collection dedicated to funeral rites, equipment, and mourning rituals of the Viennese.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

Baroque celebration of the end of the Great Plague of Vienna.

The oldest covered railroad bridge still standing in the United States.

This historic hotel invented the chocolate brownie.

This legendary city has been a tourist attraction for centuries.

Old vessels have been transformed into artistic canvases in this unusual cemetery.

On this romantic tidal island reachable only at low tide the tomb of a famous French writer overlooks the sea.

Climb inside an iron crystal magnified 165 billion times its normal size.

Singapore's landscaping project is home to 18 incredible Supertrees.

A giant baby floats in the middle of Singapore’s nature park.

Climb to the top of the world's largest seated bronze Buddha.

The design of the Palacio Salvo has been described as "a lighthouse on top of a building."

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

A bright little alley in La Boca is a part of tango history.

What was once a unique system of urban elevators is turning into a mechanical ruin.

This public elevator links the lower city to the upper city of Salvador.

Now abandoned, the world's first torpedo factory is crumbling into the sea.

Just a few miles from Novalja, a strange geological oddity has left scientists baffled.