These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

These steeply terraced ruins are a stop along the Inca Trail to Machu Picchu.

Pre-Nazi swastikas adorn the sculpted pachyderms flanking this brewhouse portal.

Nordic giants resurrected from the sea and restored to their former greatness.

Climb inside an iron crystal magnified 165 billion times its normal size.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

This weird abode has inspired everything from the "House on Haunted Hill" to a robot hunter's pad.

High on a hill overlooking Los Angeles lives a world famous, high-power conical Tesla Coil.

The world's second-largest sundial, made entirely out of stone.

Neoclassical Revival mansion and set of horror cult classic Phantasm.

This glamorous old building is said to have inspired the Tower of Terror.

This opulent hotel has been visited by Spider-Man, Charlie's Angels, and the Ghostbusters.

Three vintage horses survived a 1976 inferno and found a home on a sister carousel.