A whimsical tower with a spiral staircase, inspired by the Space Age and the Möbius strip.

Vacant Beaux-Arts buildings that serve as reminders of a beach town’s glory days.

A particularly creepy abandoned hospital that sparks interest for lovers of the supernatural.

This too-low North Carolina railroad trestle is still a notorious big rig executioner.

Three bridges straddle a stream, one stacked upon the other.

A bizarre house filled with an astounding array of collections.

The world's longest wildlife overpass provides Hilversum's critters with a safe alternative to trying their luck on the roadway.

A former insane asylum despised by Nelly Bly and Charles Dickens is now fashionable apartments.

Site of the first pathological and bacteriological research facility in the United States.

Home on the Hillside, and home of the first breakfast cereal.

A breathtaking bridge that crosses a vast gorge over a river's torrents, and has a tale of a devil architect attached.

Macabre astrological automaton clock dating to the late 1400s.

This dilapidated castle-like structure overlooks the Hudson River at one of its widest points and was once home to nuns.

Once considered the height of medical modernity, this structure is now the oldest remaining component of Roosevelt Hospital.

Scotland's oldest medieval bridge is also among the last reminders of early medieval Aberdeen.

A gravity-defying "devil's bridge" that has a surprising architectural feature for its stability.

A spring-fed pool so deep it's used for scuba diving as well as swimming.

Beautiful Gothic-inspired lighthouse stands out among the run-of-the-mill striped fare on Bodies Island.

This single room has survived the centuries with almost no deterioration.

This concert pavilion on the shore of the Great Salt Lake has been destroyed by fire, water, and disinterest but keeps coming back.

A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.

A collection of housewares from recent Irish history adjoined by a tower from ancient Irish history.

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

An abandoned meat mecca now serves as an excellent locale for urban exploration.