Walk down an otherwise nondescript alley near Washington Square West in South Philly and find yourself in a vivid, immersive mosaic wonderland.

This elaborate towering structure was once famed for its revolutionary height.

Dr Barnes' $25 billion private collection of art and arboretum.

Yo, Adrian!

A layered tribute to the work of mosaicist Isaiah Zagar.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

This 1967 experiment in modular architecture was designed to be a new model for urban living.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

Local legend has it that the Devil's claw marks are etched into this distinctive rock.

According to legend, this is the burial place of a mythical three-legged death omen horse.

Long before ultrasounds and modern testing, medical specimens like these conjoined twins helped physicians learn about congenital anomalies.

Nordic giants resurrected from the sea and restored to their former greatness.

This bridge's unique architecture honors nautical heritage and encourages self-awareness.

A novel collection of medical curiosities housed in an 18th-century surgeon training academy.

Opulence and fantasy collide in this royal chair which is supposedly made with unicorn horns.

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

Uninhabited islet in the Caribbean is the sanctuary of giant lizards.

Inside the Wayne County airport is an amazing collection of lights and sounds.

The 80-foot tire that looms over Michigan's I-94 was once a Ferris wheel in the New York World Fair.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

This steep cable railway has been hoisting passengers in the heart of Québec City for over a century.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

Two thirds of this Montreal neon icon has survived to flash another day.