A memorial to the monk who set himself on fire to protest the persecution of Buddhists in Vietnam.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

The "lovely red Vega" of the legendary record-settling pilot.

An almost life-sized elephant named Ms. Ellie greets visitors at this jumbo-themed museum.

This recreation of a 19th-century dime museum is full of oddities.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

One of the largest collections of wildlife art in the United States, built into the side of a cliff in rural Wyoming.

This grave marks the final resting place of a legendary frontiersman... unless it doesn't.

Soaring over the Niagara Whirlpool since 1916.

Storms, funding, and in-fighting have kept this Bermuda church from ever being completed.

Once a strategically imperative naval base, portions of this Bermuda dock complex now serve cruise ships.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

This strange bovine gargoyle is said to have been put in as a passive aggressive form of revenge.

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

One of seven Jewish catacombs in Rome and one of only two open to the public.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

The underground sanctuary of a mysterious ancient cult.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

One of the most controversial statues in Romania is an emperor with no clothes.

Romania's triumphal arch looks out over Bucharest.

A medieval church built up to defend its village.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."