Wander through more than 20,000 square feet filled with an amazing collection of orchids.

Traditional 11th-century outdoor tannery.

The other side is actually green.

Despite many attempts to finish this overpass, it has been abandoned since the 1970s.

A sobering account of the vibrant multicultural neighborhood that was destroyed under apartheid.

Formerly known as the Malay Quarter, Bo Kaap is a colorfully-painted suburb located in the “Mother City” of South Africa.

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

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

Futuristic apartment blocks are the backdrop for Montreal surfers hangin' ten on the Habitat '67 standing wave.

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

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

The most loyal of little dogs, or a Victorian era publicity stunt?

A statue in the heart of Edinburgh honors a bear that served in the Polish military during World War II.

There are plenty of wonderful panoramic vistas in Edinburgh, but not many are hidden smack in the middle of the Old Town.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

This woodland architectural installation acts as a camera obscura for the heavens.

The cruel trial of a 13-year-old boy inspired the creation of this now abandoned reformatory.

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

Once the home of a hermetic monk, this cave now houses a small church.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

Op-art architecture designed for happiness.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

The largest stone circle in the world has ended up bringing up more questions than it has answered.