The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

Gilded heaven for philatelists and architecture freaks, still in full working order despite sitting atop tremulous ground.

Explore the history of Mexico's lesser-known ancient alcoholic beverage.

Superstitious? Discover the witchy side of Mexico through its largest esoteric market.

Home of Philip Johnson, one of the 20th century's most influential architects.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

Frank Lloyd Wright built this suburban synagogue late in life, but it stands among his most iconic masterpieces.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

These barriers stand as stark reminders of Northern Ireland's troubled past.

The ship built to ferry passengers and goods to the doomed Titanic is now the last remaining White Star Line vessel.

A museum marks and documents the site of the Titanic's launch.

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

Thanks to its heroic service during WWII this Soviet castle has been turned into a monument towered over by a brutalist titan.

Narrow-gauge railway with its own personal power grid.

A cluster of historic bathhouses built on the famed hot springs that gave the Georgian capital its name.

A small part of Russia that does not touch any other part of Russia.

For patriotic Russians, this memorial honoring the Soviet soldiers who died liberating Berlin in 1945 is the most sacred location outside of Russia.

This monumental work of art symbolizes the coming together of a previously divided city.

Cold war icon and onetime "hole" in the iron curtain.

Berlin's old airport.

Blitzkrieg bop your way through Berlin's Ramones Museum.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

Where once there was a train station bathroom, there is now this German burger joint.

A fascinating insight into daily life in the Eastern Bloc.