Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

The longest living non-clonal organisms on Earth.

Introducing the Green Fairy to her fawning masses.

Mirrors and glass shards cover every inch of this arrestingly beautiful mosque.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

Stripes of flowers bloom each spring in a 50 acre rainbow of color.

Sandstone rock formations that look like they belong on the cover of a progressive rock album.

California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.

This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.

One of the oldest living oak trees in the Southeast.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

Nestled in the heart of San Francisco’s bustling Financial District stands a unique homage to the Mayan and Beaux Arts.

As can be expected from a centuries old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

A modern mechanical planetary system, part of a 10,000 year clock.

This semi-secret storybook hedge maze is also the oldest garden in the city.

Tokyo’s only Vaudeville-cuckoo clock–steampunk-Victorian curio cabinet time piece.

Stroll through retro Paris while shopping for old postcards and discarded doll heads.

Travelers exchange letters with woodland creatures at this mini post office.

A whimsical antique shop with a strong air of mystery, filled with items from ages, and what feels like worlds, past.

Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.

The final resting place of a space program monolith.

Rent out a glass igloo to watch the Northern Lights like you live in the future.