Man-made mineral caves house massive bat colony.

A house covered entirely with shells.

A National Historic Landmark with a scenic clock tower and park filled with deer and peacocks, plus a military museum.

In a city filled with Frank Gehry buildings, one stands out as one of the architect's weirder works.

An eccentric home in Sicily turns heads on a regular basis.

Visitors can walk over the largest concentration of Columbian mammoths to have died from one event.

Now a pile of ruins and rubble, this was a lovely mountain town as recently as 1960.

A gleaming white and undulating tower marks the border between Georgia and Turkey.

China's most famous acrobatics act.

Ruins of the Crusaders' headquarters.

A tunnel once abandoned now thrives with graffiti art as an off-limits makeshift gallery.

Ample proof that watery ends make for well-preserved, millenia-old mummies.

This 1000 year old relic-filled cave monastery and UNESCO World Heritage Site also hosts an amazing micro-miniature museum.

Death rituals and sacrifice inside a Peruvian megalith.

A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.

A unrivaled and rather horrifying collection of wax dermatological models.

Three-story concrete ram with a permanent gift shop.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

Small, privately owned island divided between Michigan and Ohio with abandoned vacation homes and a derelict lighthouse.

Hunt for buried treasure in Nova Scotia.

See six states, pickled freaks, rocks, and antiques.

Extraordinary animals sculpted from leftover junk.

"The Wonder From Down Under," a worm shaped museum celebrating the endangered Giant Gippsland earthworm.

A toy store with a century-long history preserves the craftsmanship of playthings of the past.