A wall of chewing gum moonlights as collective art.

Built for an exposition in 1915, these horticultural displays have stood the test of time.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

A historic Montreal market that was the city's agricultural hub for over century.

The Master of Magnetism dominates the walls of a scrap metal yard to keep graffiti artists at bay.

A private residence adorned with a gorgeous mural dedicated to the buzzing insect.

There aren't too many operational funiculars around, but Pittsburgh has two!

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

Inside this Icelandic greenhouse, geothermal energy keeps tomatoes warm and growing.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

The final resting place of the controversial chess champion.

At this 16th-century monastery in rural Bulgaria, visitors can also spend the night.

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

A striking symbol of the Bulgarian capital.

The only recreation of William Shakespeare's indoor playhouse.

A railroad tunnel that, upon its completion, was considered one of the engineering marvels of the modern world.

The story behind the mysterious symbol painted in front of the historic university's famous Rotunda.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

The resting place of a Civil War celebrity's amputated limb.

Inspired by a foil-wrapped potato, (seriously) the Markel Building has been deemed one of the 10 ugliest buildings in the world.