The last gas-lit cinema in the United Kingdom, and perhaps the world.

This Gothic castle-like portal is a testament to the amazing craftsmanship of the navvies who built the railway tunnel.

Winner of the Leeds Award for Architecture and the Environment.

Old cabin-like homes in a rural community untouched by time are known for their vibrant and colorful window shutters.

A collection of art from Bulgaria's time as a communist state.

"Holy Wisdom" overlooks the city that became its namesake.

A striking symbol of the Bulgarian capital.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.

Taking the subway here means doing so over a bridge located in the middle of an estuary.

A meow-velous tribute to a beloved street cat, made famous on the internet.

A fountain standing as a testament to a doomed alliance.

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

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

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

The largest known medieval map of the world.

Rare collection of medieval books under lock and key.

The name of this suspended sculpture is Latin for "high horse," which is exactly what it is.

This sculpture of Edward of Woodstock is surrounded by eight Victorian lamp bearers.

One of three sites in England that house the National Collection of Arms and Armour.

This Victorian graveyard in Leeds is a macabre collection of beautiful tombs and memorials.

Artists have long been drawn to these atmospheric 12th-century ruins.

The bizarre headgear looks like it was made for a fool, not a king.

This historic black and white monastery is one of Bulgaria's architectural jewels.

The ceiling of Prohodna Cave in northern Bulgaria affords a peek at the sky via two deity-sized-eye-shaped holes.