A collection of historical engines and rolling stock from throughout Riga's rich railway history.

A former graveyard for Riga’s elite is now a large park with elegant monuments.

The final resting place of the man whose name has become synonymous with greatness.

Not far from where one of the most famous Swedes of all time is buried, an infamous man was put to rest.

A historic arboretum and non-conformist, non-denominational park cemetery.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

A historic London cemetery now serves as a nature park incorporating gravestones & memorial statues.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

A relic of Victorian grandeur hides beneath a busy South London road.

The elegant structure of this 19th century railroad bridge creates an illusion of infinity.

Half-drowned wooden stumps and stone blocks are all that remain of a Victorian landing that was destroyed by storms.

An unassuming churchyard is the resting place of a pioneering surveyor and reluctant namesake of a mountain.

These seaside shelters once enjoyed by royalty remain a part of local history.

Now isolated, this church was once the center of a bustling village that succumbed to the Black Death.

A forgotten graveyard lost in the tangles of an overgrown garden.

The final resting place of the poets Shelley and Keats.

Established in 1638 to battle the Black Death, this botanical garden is a treasure trove of rare flora.

The attic of a four-century-old canal house hides a clandestine church.

A museum dedicated to secret surveillance.

In the heart of Tirana, this underground nuclear bunker has been transformed into a museum.

This is the largest cemetery in Ireland and the first cemetery museum in the world.

One of Ireland's most infamous prisons for rebels including men, women and children.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

The smaller of the three towers of San Marino is a former prison inaccessible from the ground level.