Most famous work of one of Frank Lloyd Wright's sons.

These millipedes glow not out of attraction, but as a not-too-subtle warning.

World-famous, Pink's still manages to keep its prized cult fetish status.

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

A winding path built in secret on the edge of the continent.

Crypt mausoleum in cathedral's basement contains relics of third century Roman martyr, Saint Vibiana.

A hand-built folk art installation covered with messages of God's love.

Towering basalt columns, a creation of fire and ice.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

Exquisite examples prehistoric bas-relief carvings.

Ancient paintings known as the "Sistine Chapel of Cave Art."

The curious underground history of keeping Paris clean.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

The site of Neil Armstrong's first flight is marked by a full on replica of the moon landers.

The largest ancient burial mound in Ohio.

Deep scars on the earth left by the Ice Age.

Garden dedicated to native carnivorous plants and site of huge flytrap heist.

These eerie outliers of the lightning bug family glow a mysterious blue color.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

Order scoops of pandan, lychee, and black sesame at this family-run institution.

A miniature rainforest is growing inside of a Midtown Manhattan office building.