This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

Where the lovelorn find a home for their sentimental keepsakes.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

A section of the long chain that blocked enemy ships from entering Constantinople.

This column celebrates Rome's victory over the Goths, and may be the oldest Roman monument in Istanbul.

An Art Nouveau gem hides beneath the layers of city grime obscuring this once-magnificent building.

A gorgeous, Gaudí-esque stairway constructed in the city of Istanbul by a prominent Jewish family.

The only Roman honorific column in Istanbul.

The most metal church of all time was built in record time because of an international, pious pissing contest.

Climb a set of vertiginous stone steps to the top of this impressive ancient edifice.

Have tea in a cemetery with a dazzling view of Istanbul.

Step back in time and witness the fall of Constantinople.

The ornate miniature mansions were built for Istanbul's feathered residents.

This half-forgotten fortress was constructed by the Ottoman conqueror of Constantinople.

A particularly disconcerting tribute to Irish martyrs.

Fantastic stainless steel dragon gates complete with mesh wings.

Wallabies live naturally on this Irish island.

A former fortified tower now houses a collection of classic communications equipment.

A monument dedicated to the civil uprisings that took place during the Pots and Pans Revolution.

The exhibition explores the Icelandic city's Viking Age history.

The first woman to become a member of the parliament of Iceland.

Iceland's tribute to its thankless civil servants.

This verdant, tree-lined Reykjavik graveyard is both enchanting and eerie.

This aromatherapy shop and mini-museum cofounded by the Sigur Rós frontman documents Icelandic history through scents.