Largest Roman Catholic church in North America.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

The national park was once a plantation estate.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

The United States Capitol's former columns still stand.

Artifacts showcasing the witchy history of Zambia.

The world's highest and most dangerous infinity pool lies at the precipice of Victoria Falls.

A powerful tribute to the victims who suffered under Ethiopia's most devastating regime.

Strolling through these vintage locomotives offers a surprising amount of insight into the history of Kenya.

This tourist village in Nairobi celebrates the traditional lifestyles and customs of Kenyan tribes.

Get tall with nature's lankiest beasts and their warthog friends at this Kenyan preserve.

One of the most elaborate displays of Jellyfish is on display at the aquarium.

Oakland's beautiful monumental cemetery.

Concrete strongholds stand guard over the Golden Gate.

One of the oldest producers of hand-folded fortune cookies still uses its original secret recipe.

A man-made island in scenic San Francisco Bay.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

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

An essential stop before plundering, BYO Cutlass.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

San Francisco's newly reopened hands-on science museum.

A collection of 20th-century automata, penny arcade games, and musical contraptions.