A grove of colossal man-made flowers built to collect the sun's rays.

An immense cave that has served as an outlaw's treasure trove, an underground dance hall, a nuclear fallout shelter, and much more.

A grassroots community effort in the 1970s led to the creation of this beautiful garden full of delightfully whimsical exhibits.

A building so large that it has its own weather.

This retro, UFO-like structure is a remnant of the Soviet-era circus.

A building facade covered with the statues of 11 giants of Tajik literature.

The world's second-tallest flagpole stands proud despite dropping rank.

Have tea in a cemetery with a dazzling view of Istanbul.

This Ottoman bridge is a rare covered bridge with shops, and considers itself the only bazaar bridge in the world.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

This park contains a number of standing stones meant to heal and inspire.

This vast masterpiece of Moroccan architecture spreads across 20 acres.

Traditional 11th-century outdoor tannery.

Thousands of narrow alleyways in an ancient medieval city make up what's believed to be the world's largest car-free urban zone.

The largest madrasa in Morocco once housed more than 900 students within its exquisite walls.

Mosaics, storks, and brothels—this ancient city has it all.

The other side is actually green.

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

A blacklight journey through a celestial art exhibit.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

A museum dedicated to the alleged Roswell Incident.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

This is one really big nut.