This beachside town is home to a diverse nature reserve, multiple cays, and one of the three bioluminescent bays in Puerto Rico.

Puerto Rico's once thriving oil company is now an abandoned wonderland of rusty steel.

A park where people have been going to feed friendly pigeons since the 18th century

Everyone from Alan Ginsberg to The Rolling Stones has stopped by this classic dive bar.

This chapel on a cliff is renowned for its healing powers and was founded on the site of a supposed divine intervention.

This colorful gate stands as an entrance to the walled city of Old San Juan.

This tiny home was originally a narrow alleyway.

Invading U.S. troops were first seen from this now-abandoned tower, leading to the Spanish-American War.

Archaeological sites and great food inside the island's largest mangrove forest.

Outside this souvenir shop is a statue of Bigfoot composed of volcanic ash, and plenty more to see inside.

A rare view of a preserved Victorian science museum.

One of the few remaining monuments dedicated to South Boston's Irish heritage.

The last remaining building in Washington, D.C., built by H.H. Richardson, one of America's most iconic architects.

A celebrity from the late Cretaceous period.

A tribute to the pop culture icon overlooks this Washington D.C. intersection.

When oil was discovered just outside of Pittsburgh, the city became home to this regional stock market.

The largest clock face in the United States is twice the size of Big Ben and infinitely more ad-sponsored.

The last remnants of Fort Pitt also hold the distinction of being the oldest structure west of the Allegheny Mountains.

There aren't too many operational funiculars around, but Pittsburgh has two!

Walk through a clothing store, across a courtyard, and up several flights of stairs for delicious coffee with a side of beautiful views.

The notorious "Hanoi Hilton" where Vietnamese colonial subjects and later American POWs, including John McCain, were imprisoned.

Ha Long Bay's "Cave of Surprises" houses a popular phallic rock formation.

This candy-pink cathedral of Da Nang is also known as the Chicken Church.

This bridge is embedded with a giant steel dragon that breathes fire from its mouth.