The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

This giant middle finger statue sends an unambiguous message to Italy's bankers.

Old batteries and frog skeletons reside in this lakeside monument to Alessandro Volta.

Paris' linguistic guide to the international language of, yes, love.

France's most famous cemetery, with some of its most curious tombs.

Few other hotels can rival the grandeur of the Castle in the Rockies.

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

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

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

Clusters of abandoned buildings hint at the facility's 144-year history with psychiatric health.

Niagara Falls holds a special place in Nikola Tesla's history, so they put a statue on it.

Louise Bourgeois' 30-foot-tall steel spider sculpture.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

Soaring over the Niagara Whirlpool since 1916.

With well over 130 falls and cascades to brag about, Hamilton, Ontario has earned its stripes as the waterfall capital of the world.

This natural sea cave hides a small wonderland of natural turquoise beauty.

Stunning Roman aqueduct used for 1900 years and still standing.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

An ancient Egyptian temple in the middle of Madrid, Spain.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Protecting the dead from opportunistic body snatchers.

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