One man's remarkable private collection of art from around the world.

This charming candle shop has been in business since 1789.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

The world's oldest bookshop still in operation.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

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

The mummified relic of St. Antoninus.

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

The largest and most famous wax anatomical collection anywhere in the world.

The middle finger of modernity.

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

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

The tech giant built three enormous glass orbs in Seattle so employees could work inside a rainforest greenhouse.

This semi-secret garden in south Seattle emulates a traditional Japanese garden using the plants of the Pacific Northwest.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

An abandoned quicksilver mining town surrounded by the Big Bend parks.

This old abandoned sign flickers to announce a motel that isn't even there.

Minimalist modern art on a repurposed military base in rural Texas.

This quirky outpost and gallery inside a former church is an unexpected trove of handcrafted art.

A little stop along the Texas highway where Rock Hudson, Elizabeth Taylor, and James Dean stayed while shooting the 1955 film "Giant."

A Texas cave network is home to some of the world's most spectacular-looking and bizarrely named mineral formations.