Mysterious library of an infamous financier and spiritual seeker.

Ancient snack bar of the Roman Empire re-opened.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

A bizarre roadside attraction and the first instance of miniature golf in the world.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Less a museum than a bizarre fantasy world created by artists and engineers.

Breathtaking and huge 430 year old maps of Italy.

The world's longest known cave system.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

This replica of the Greek structure is in the heart of Nashville.

What happens when a sculptor has to find a way around a 100-year-old copyright.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

The site of the climactic scene from the classic horror film is now a historic landmark.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Home to items never before seen by the public.

The second oldest continuously operating bar in Louisiana.

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

At 207 feet, one of the world's longest continuous escalators.

The magic's in the hole!

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Elevated freight railway turned wildly successful urban park.