This giant temperature attraction created some giant electric bills.

The unique location where the former president was rapidly sworn in.

The bullet-riddled wall from the St. Valentine's Day Massacre, bloodstains enhanced for your viewing pleasure.

A collection of haunted objects and macabre oddities under one roof.

A tiny slice shop hides down an unmarked hallway in a Las Vegas casino.

This incredible collection of vintage pinball machines can be played at 25 cents a pop.

Ancient serpentine sacrifice holder that has stood the test of time.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

A marvel of Byzantine engineering under the streets of Istanbul.

Sofia's legislative center is continuously reinventing itself.

This downtown Dallas art installation is always on the lookout.

An extensive collection of reliquaries containing the bones of saints housed in the largest Catholic church in Venice.

A sinister pyramid in the Frari contains the heart of the famous neoclassical sculptor.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

As can be expected from a centuries-old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

The marble facade hides a little-known medical museum with early surgical instruments and rare copies of canonical texts.

Despite their macabre past, these hooks are said to bring good luck to those who touch them.

A new sculpture calls attention to climate change in the centuries-old city it threatens.

In the past, Renaissance sex workers were encouraged to entice customers on this bridge.

According to tradition this is the oldest church in Venice, but its actual age is a mystery.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

Go inside to really appreciate this 500-year-old technological masterpiece.

This Roman statue is missing a limb from when the Venetians stole it from Constantinople during the Crusades.

Two stone columns flank the grand Venice square, but there were supposed to be three.