According to legend, this cavern holds the passage that Persephone used to travel to and from the underworld.

One of the greatest collections of coins in the world is housed in the former mansion of an archeological pioneer.

One of the world's largest salt caves is filled with fragile salt sculptures, salt rivers, and huge salt megadomes.

Sculpture park built by a 50-year-old widow.

At one South African whaling station, this industrial extermination led to a feeding frenzy that may have even been a key inspiration for Jaws.

The original goat tower, the one that started it all.

A shining, cold, black organ lies in San Francisco's financial district.

27-room home built with the fortune of a sugar magnate.

Tiki luxury on Nob Hill.

A 16th-century horror show built in a lovely Italian garden.

Russian history in San Francisco.

Since 1973, this block has been home to the most concentrated collection of murals in San Francisco.

This naval gun is fired every day at noon, an odd timekeeping tradition the origin of which is local legend.

Take a cruise with no movement but plenty of style in this one-of-a-kind boat mall.