Commonly known as the garrison church, this Neo-Byzantine-style building was designed and built by order of Russian Tsar Alexander III in the late 19th century. Located at the eastern end of the main pedestrian street Laisves aleja, it is one of the most impressive landmarks of the city, and a lot more than a Roman Catholic church: the catacombs underneath are home to the Museum for the Blind, where there is not much to see—but a lot to experience!

St Peter's Church in Riga is known for its tall tower, which offers stunning views of the city, including the red roofs of Old Town, the modern part of Riga, Riga Bay, and the Daugava River with its large port. The church itself was originally built in 1209, but only a few walls and pillars remain from that time. The Gothic tower, which was over 130 meters tall, was completed in the late 15th century. However, it collapsed in 1666 and was rebuilt in the Baroque style in 1690–at the time, it was the tallest wooden structure in the world. In 1721, the tower was struck by lightning and burned down. It was later restored, but once again it burned down during World War II. Renovation of the tower began in 1967, and today, it stands at a height of 123.25 meters. Visitors can access the second gallery, which is 72 meters above the ground. In 1997, St Peter's Church was added to UNESCO's World Heritage list.

Visible from almost everywhere in Cartagena, the Convent of Santa Cruz de la Popa all the way up the 150-metre hill known as Mount Popa. The hill got its name for resembling a poop deck of a ship. After four centuries of varied history, the convent itself is now open as a religious museum. From the top Mount Popa you’ll get the best panoramic views of Cartagena and its beaches. The fastest and least stressful way up the hill is with a taxi (be sure to haggle on the price). Important tip: if you take a taxi or a car service to this location, pay them a few pesos to wait for you to drive you back. The taxis on top are all already "reserved" and Uber drivers are not eager to drive all the way to the top to pick you up.

The mangrove tunnels of nearby La Boquilla are an easy day trip from Cartagena. Guided tours will often combine a visit to the beach (one of the Playas De La Boquilla) with a boat or canoe tour of the mangroves, passing through Cienaga de Juan Polo and the Cienaga de la Virgen lagoons. Some tours will also include a closer encounter with local fishermen and offer insight into their craft. La Boquilla is an area of contrasts: the district of upscale hotels — Morros — borders on humble neighbourhoods populated by workers. When sitting down to tuck into no-frills seafood dishes served up by local eateries, make sure you're clear about the price of each item ordered from the get-go, as there have been reports of "surprise" bills amounting to several hundred US dollars.