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.

A unique set of caves that spits waves back out into the ocean.

This narrow coastline trail through the dense Kauai wilderness is among the most beautiful and dangerous in the world.

This mom-and-pop Japanese sweets shop has been serving cloud-light mochi for almost a century.

Submerged lava formations create incredible waterworks.

These ancient sacred grounds granted amnesty to those who managed to reach them.

This legendary urban waterfall creates a dazzling display of rainbows.

This black shoreline is made up of exploded lava particles.

Watch the newest land on the planet form before your eyes.

The center of Stockholm can be found along this quiet street.

Sound travels strangely in this underground whispering gallery.

Stockholm's tiniest statue is of a small boy looking at the Moon.

A Japanese video game arcade hides in the back of a Swedish pool hall.

Stockholm's narrowest alley is barely over two feet wide.

The internet as provided by a James Bond villain.

Street artists transformed this abandoned industrial neighborhood into one of Europe's largest graffiti exhibitions.

Now a hotel, this former bank was the site of a robbery that spawned a psychological phenomenon.

The world's largest model of our planetary system.

The library's graceful rotunda is like a bibliophile's temple.

A unique work of automotive art calls this shopping center home.

This bronze statue of Martin Luther King was placed in the park without permission.

Some 80,000 Delft Blue tiles line the inside of this Amsterdam walkway.

This 1920s Amsterdam neighborhood was built as a giant experiment in concrete construction.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.