A space-age 1950s pavilion on a secluded path is full of Toronto history surprises.

A tunnel that brings more than a century of history to life from the deepest parts of the Niagara Gorge.

A giant metal mosquito prepares to feast.

This strangely specific landmark will let travelers know when they are half way there.

The world’s first museum dedicated to exploring human rights unleashed a wave of controversy.

An authentic replica of an Asian temple and garden hidden amongst the natural beauty of Hawai'i.

Climbing this abandoned railway leads to breathtaking vistas of O‘ahu.

On Waikīkī Beach, a monument to four extraordinary individuals of dual male and female spirits who brought the healing arts from Tahiti to Hawai'i.

This Hawaiian cattle ranch acts as a museum devoted to the island cowboys that predate the wild west.

The prototype for all Nazi concentration camps.

A lush green oasis in the middle of Chicago.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

The "Seinfeld" diner.

Elevated freight railway turned wildly successful urban park.

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.

A building so large that it has its own weather.

This hotel is an amazing example of the Escuela Tapatía de Arquitectura movement.

The former headquarters of Mexico's Secretariat of Public Education now houses a muralism museum, including Diego Rivera's first large-scale mural project.

Many people don't realize there’s a lot going on in—and below—the world’s tallest triumphal arch.

The hot chocolate here all stems from small, sustainable microproducers in Chiapas and Tabasco.

A museum in the former home of Marxist revolutionary Leon Trotsky.

The only castle in North America to ever house European sovereigns.

Frida Kahlo's childhood home, now a museum of her life and works.