SI Super Intelligence curated directories

GU · Curated travel guide

Guam: 10 places worth the journey

Mariana Islands, Mount Lamlam, Dulce Nombre de Maria Cathedral Basilica and 7 more — what each one is, and why it is worth the detour.

Places
10
Language
English, Chamorro
Currency
USD
Mariana Islands, Guam
Mariana Islands · Archipelago in the north-western Pacific Ocean · CT Snow from Hsinchu, Taiwan, CC BY 2.0

What to see in Guam

Chosen from everything Wikidata knows about Guam and ranked by how many Wikipedia language editions describe them, which is about as close to "famous" as open data gets.

Mariana Islands

Mariana Islands

Archipelago in the north-western Pacific Ocean

Also just the Marianas, a crescent-shaped archipelago in the north-western Pacific formed by the summits of fifteen mostly dormant volcanic mountains lined up north to south, between 12° and 21° north and along 145° east. Lying east of the Philippines, north of New Guinea, west-southwest of Hawaii and south-southeast of Japan, they mark the eastern edge of the Philippine Sea.

Photo: CT Snow from Hsinchu, Taiwan, CC BY 2.0

Mount Lamlam

Mount Lamlam

Mountain in Guam

A peak on Guam, a United States island, near Agat village in the island's south-west.

Photo: LittleT889, CC BY-SA 4.0

Mariana Trench Marine National Monument

Mariana Trench Marine National Monument

US national monument in the Mariana Archipelago

A United States National Monument set up by President George W. Bush through presidential proclamation no. 8335 on January 6, 2009. It has no dry land but protects 95,216 square miles (246,610 km²) of underwater land and sea at several places around the Mariana Archipelago, including submerged volcanos and part of the Mariana Trench.

Photo: United States Office of Insular Affairs (Department of the Interior), Public domain

War in the Pacific National Historical Park

War in the Pacific National Historical Park

National Historical Park of the US

A protected area of several units on Guam, a United States territory, set up in 1978 to honour those who took part in World War II's Pacific Theater. Alone in the National Park System, it honours the bravery and sacrifice of everyone who took part in that theatre.

Photo: NPS photo, Public domain

Plaza de España (Hagåtña)

Plaza de España (Hagåtña)

United States historic place

A plaza in central Hagåtña, capital of the United States territory of Guam, where the Governors Palace stood during the long Spanish occupation. Most of the palace was destroyed when Hagåtña was shelled during the retaking of Guam in World War II.

Photo: Abasaa, Public domain

Agana Spanish Bridge

Agana Spanish Bridge

United States historic place

Built of stone in 1800, under the Spanish governor Manuel Muro, an arched bridge in Hagåtña, capital of Guam, a United States territory; no other Spanish bridge survives in the city.

Photo: Daderot, CC0

Fort Santa Agueda

Fort Santa Agueda

United States historic place

A fort on Guam Highway 7 in Hagåtña, Guam, dating from about 1800, under Spanish governor Manuel Moro, who governed from 1784-1802. It was an open fort with a manposteria parapet standing about 10 feet (3.0 m) above a sloping hillside.

Photo: Abasaa, Public domain

Apra Harbor

Apra Harbor

Seaport in Guam

Also called Port Apra, a deep-water port on the west side of Guam, a United States territory, regarded as one of the Pacific's best natural harbours.

Photo: US Navy, Public domain

Cocos Island (Guam)

Cocos Island (Guam)

Island off the southern tip of the United States territory of Guam

Lying 1 mile (1.6 km) from the southern end of Guam, a United States territory, an island inside the Merizo Barrier Reef, in Malesso' municipality. No one lives there; it is 1,600 meters (5,200 ft) long from southwest to northeast, its width ranges from 200 m (660 ft) to 300 m (980 ft), and it covers 386,303 m².

Photo: Unknown, Public domain

About Guam

An organized, unincorporated United States territory in Micronesia, in the western Pacific. Its capital is Hagåtña and its most populous village Dededo. Measured from the geographic center of the U.S., it is the country's westernmost point and territory.

Officially The Territory of Guam.

Based on the Wikipedia article, licensed CC BY-SA 4.0: the facts are Wikipedia's, the wording is this site's.

Questions travellers ask

What is worth seeing in Guam?

This guide lists 10: Mariana Islands, Mount Lamlam, Dulce Nombre de Maria Cathedral Basilica and Mariana Trench Marine National Monument and others.

How were these places chosen?

By machine, from open data, with no human ranking them and nobody able to pay for a place on the list. Everything Wikidata records in Guam that is a building, a landform, a protected area or a tourist attraction, has coordinates, a photograph and an English Wikipedia article, is ranked by how many Wikipedia language editions wrote about it. Provinces, cities, airports, stations and stretches of sea shared with the neighbours are filtered out.

What language is spoken in Guam, and what currency?

English, Chamorro. The currency is USD.

How do I get mobile data in Guam?

A travel eSIM is usually the cheapest way, and avoids a roaming bill. The plans suggested at the foot of this guide start at $4.46 for 1GB for 7 days. The eSIM is data-only and sits alongside your normal SIM, so calls, texts and WhatsApp keep working on your own number.

Which networks would my phone use in Guam?

GTA Wireless. Your phone picks whichever has the best signal where you are, the same way a local phone does.

One practical note: staying online

Maps, tickets and translation all want data, and roaming is the expensive way to get it. A Computatus eSIM eSIM connects to GTA Wireless once you land, and installs by QR code before you leave.

See 14 Computatus eSIM plans for Guam from $4.46
Prices as exported 2026-07-31. Tap a plan to open its order page.
Plan Data Valid Price Order
1GB for 7 days Cheapest 1 GB 7 days $4.46 Get it →
1GB per day 1 GB 1 day $4.46 Get it →
1GB per day 1 GB 1 day $4.46 Get it →
2GB per day 2 GB 1 day $9.42 Get it →
3GB for 15 days 3 GB 15 days $11.90 Get it →
3GB for 30 days 3 GB 30 days $12.64 Get it →

No app needed. Install by QR code before you fly, keep your own number for calls, and it connects the moment you land.

GTA Wireless 4G

Open the $4.46 plan →

A commission on plans bought through these links is what pays for this guide. Nothing above depends on it: the places are chosen before any price is looked up.