Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

Obscure Freemasons still live in D.C.’s largest private residence.

A computer bug so primitive it was an actual insect.

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

The famous abolitionist’s preserved estate is one of Washington's finest monuments to its great Black citizens.

Largest Roman Catholic church in North America.

The walls of the iconic dome are hollow and have a secret stairway.

The Byzantine, pre-Columbian, and medieval art at this stately mansion are some of the most under-appreciated collections in D.C.

The country's oldest continually-operated mini golf course lies hidden in plain sight, eclipsed by one of D.C.'s most popular tourist attractions.

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

A gleaming white tower in ornate Indian style soars above the low-slung bungalows of north Tampa.

Sculptures of religious figures made from the ashes of pilgrims' incense.

Climb to the top of the world's largest seated bronze Buddha.

Remnants of the most densely packed city in world history, that thrived on anarchy for 30 years.

Teeming with illegal goods and services, this towering maze of vice is also a popular tourist accommodation.

This hulking behemoth is actually five interconnected towers built in the 1960s.

Marikina's record-breaking loafers.

The confluence of modernist and traditional architecture in this religious complex reflects the history of both the living and the dead being uprooted, displaced, and rehoused.

Colorful umbrella-covered trees in Singapore's Little India look straight out of Dr. Seuss.

Singapore's oldest Hindu temple.

The largest monastery in Singapore is home to a crematorium, a college, and one of Asia’s largest indoor Buddha statues.

This house is one of the most colorful in the country, and is the last remaining example of a historic villa.

Singapore's last surviving traditional village is hidden among giant skyscrapers and modern infrastructure.

Frozen in Norway, vended in Singapore.