A hand-built folk art installation covered with messages of God's love.

What if the cure for all that ails you was as simple as repeated exposure to low-dose radon?

In the middle of a remote desert town is a surprisingly opulent hotel.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

In the 1940s, Italian architect Mario Cavallè built a dozen of these round homes in northern Milan.

These simple structures are living monuments to the fishermen who built this community over a century ago.

A uniquely lettered street sign marks the corner where the iconic word game was invented.

You can row a boat through this ancient underground reservoir.

These numerous Israeli caves were dug out over hundreds years for reasons ranging from hideouts to burial sites.

Houses are tucked between, on, and underneath giant boulders.

This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.

These gnarly desert trees produce the prized aromatic resin traded along the ancient incense trail.

Hundreds of glow-in-the-dark objects light up a museum in a historic zinc mine.

One man's eclectic collection of treasures found at sea.