This industrial Art Nouveau gem is a historic hotspot for Mexican counterculture.

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

Now a museum, this building was once a 14th-century monastery and the place where the founder of the Dutch nation lived and was assassinated.

This narrow Ghent alleyway is an officially sanctioned street art tunnel.

The tragedy of the Japanese internment camps is remembered here by a stark "Soul Consoling Tower."

The century-old bell and clock tower at UC Berkeley is the third-tallest in the world, and has fossils.

Devoted Buddhists can earn enlightenment in the next life by crawling through this symbolic nostril.

Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

Statue of Lenin, from Cold War era Czechoslovakia, now in a neighborhood of Seattle.

A wall of chewing gum moonlights as collective art.