Portugal's National Pantheon has a history of curses, collapses and financial problems.

An exquisite collection of fairytale conveyances that puts most car museums to shame.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

The world's oldest bookshop still in operation.

Hidden behind a wall, Spanish nuns distribute their signature sweets on a revolving tray.

A 16th-century Andalusian palace.

The world's largest wooden structure.

The extravagance of Portugal’s "Pink Palace" resulted in a noble title being awarded to its owner.

At night, bats patrol this magnificent 18th-century space in search of book-eating pests.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

"Portugal's Stonehenge" is made up of nut-like stones aligned with the heavens.

This park feels like a lush little jungle full of wildlife nestled within São Paulo.

This crumbling industrial fortress has attracted daredevils, filmmakers, and historians.

Montreal's colorful subway station shows its support of the local LGBT+ community.

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

City law dictates that this mountaintop cathedral containing the heart of a saint is to remain the tallest building in town.

Montreal's giant farmer's market is a foodie's best friend, especially in the winter months.

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

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.

"Congress may voluntarily remain in session throughout the summer, in order that our Congressmen may be protected from the intolerable discomforts and dangers of the ordinary outdoor weather!”

Legend has it that President Grant’s frequent drinking in the lobby gave rise to the term “lobbyist.”

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.