66,000 pieces of art, donated by one of the world's richest men.

Part bookstore, part café, and part forest.

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

A tiny red pebble marks what may be the quietest outdoor spot in the United States.

Order cookies baked by cloistered nuns in a 400-year-old monastery.

It appears as if a man is standing behind this giant airport clock, painting the hands in real time.

A working steam clock, one of only a few in the world, located in Vancouver's Victorian Gastown.

The world's largest model of our planetary system.

The last remnants of Fort Pitt also hold the distinction of being the oldest structure west of the Allegheny Mountains.

Sections of the iconic limestone columns have been left uncleaned as a reminder of the city's polluted past.

Meet your friends, marry your true love, or tell your enemies to kiss your butt under this historic Pittsburgh timepiece.

Despite being stolen multiple times, this civic electrician's street corner Snoopy won't be stopped.

The United States Capitol's former columns still stand.

Wine bottle sculpture with a ship's stateroom inside.

The floor-to-ceiling collection in an old factory is a unique alternative to stuffy galleries.

A room hidden behind a swinging shelf in the children's section.

A giant steel sculpture with animals in its shadows.

James Turrell's total color immersion art installation, hidden on the top floor of a luxury handbag shop.

A lush indoor jungle fills this bustling Madrid transportation hub.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

This mesmerizing kinetic sculpture blossoms endlessly in the breeze.

A swaggering, monumental souvenir of the most extravagant party Montreal’s ever thrown.

This hidden park hosts a rogue’s gallery of eccentric architectural obelisks.

Its columns were all carved from the same white oak tree.