South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

This nine-story building can be played like an instrument.

A psychological self-portrait in the form of a giant, segmented head.

An old train trestle re-imagined as an Egyptian obelisk.

The world's largest fire hydrant is supposedly tornado-proof.

This titanic steel chain linking two buildings was installed without permission but instantly beloved.

This psychedelic tromp l'oeil seems to be beckoning drivers to crash into a wall.

This set of rickety spaceships are prepared to give alien travelers a place to relax and go to the bathroom.