This French colonial post office is arguably the grandest in all of Southeast Asia.

This cavern was used as a hidden hospital and safe house during the Vietnam War.

The world's largest clay lick, where parrots gather to snack.

This small oxbow lake has rare giant river otters and some Seussian-sounding birds.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

An underground city of salt.

The beautiful baroque library of the Hapsburg empire.

The final resting place for the remains of 143 Habsburg royalty.

An exquisite Baroque church in Vienna's old town.

Baroque celebration of the end of the Great Plague of Vienna.

The solemn exterior conceals an opulent interior of this 17th century church.

The little bear in the "funny kind of hat" has made his way from London back to Peru.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

A popular European tradition makes its way to the states on one of America's most famous bridges.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

This remarkably well-preserved Incan city managed to survive the conquistadores.

A wunderkammer of gold and silver reliquaries and ancient saintly bones.

Now harmless, this looming post struck fear into the heart of medieval troublemakers.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.